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Rule 34 | anatomy, artist request, biollante, biology, chart, clone, cross-section, diagram, godzilla (series), godzilla vs. biollante, kaiju, monster, official art, organs, science, science fiction, stomach, toho, translated, x-ray

Rule 34 | anatomy, artist request, biology, brain, chart, cross-section, diagram, drill hand, godzilla (series), godzilla vs. megalon (1973), kaiju, megalon, monster, official art, organs, science, science fiction, toho, translated, x-ray

Rule 34 | anatomy, artist request, biology, brain, chart, cross-section, diagram, drill hand, godzilla (series), godzilla vs. megalon (1973), heart, kaiju, lungs, megalon, monster, official art, organs, science, science fiction, stomach, toho, translated, x-ray

Rule 34 | anatomy, artist request, biology, brain, chart, cross-section, destoroyah, diagram, extra wings, godzilla (series), godzilla vs. destoroyah, horns, intestines, kaiju, low wings, monster, official art, organs, pincers, science, science fiction, single horn, stomach, tail, toho, translation request, wings, x-ray

Rule 34 | anatomy, artist request, biology, brain, chart, cross-section, diagram, ghidorah, the three-headed monster, godzilla (series), heart, intestines, kaiju, lungs, monster, official art, organs, pterosaur, rodan, rodan (film), science, science fiction, stomach, toho, x-ray

Rule 34 | anatomy, anguirus, artist request, biology, brain, chart, cross-section, destroy all monsters, diagram, dinosaur, extra brains, godzilla (series), godzilla raids again, heart, intestines, kaiju, lungs, monster, official art, organs, science, science fiction, stomach, toho, x-ray

Rule 34 | alien, anatomy, biology, brain, chart, clone, cross-section, diagram, godzilla (series), godzilla vs. spacegodzilla, heart, intestines, kaiju, lowres, monster, official art, organs, science, science fiction, spacegodzilla, spiked tail, stomach, tail, toho, x-ray

Rule 34 | anatomy, chart, cross-section, crystal, diagram, energy, energy beam, eye beam, gem, godzilla (series), godzilla vs. mechagodzilla, golem, kaiju, king caesar (godzilla), light, lowres, monster, official art, prism, red gemstone, science, science fiction, toho, translation request, x-ray

Rule 34 | anatomy, brick, chart, cross-section, crystal, diagram, gem, godzilla (series), godzilla vs. mechagodzilla, gold, golem, kaiju, king caesar (godzilla), lowres, monster, official art, prism, red gemstone, science, science fiction, toho, x-ray

Rule 34 | alien, anatomy, artist request, biology, brain, chart, cross-section, diagram, godzilla (series), godzilla vs. hedorah, hedorah, kaiju, lowres, monster, official art, organs, science, science fiction, stomach, toho, x-ray

Rule 34 | anatomy, atomic breath, aura, baby, baragon (godzilla), biology, bone, breath weapon, chart, conjoined, cross-section, cyborg, diagram, dinosaur, electricity, energy, energy beam, energy field, energy pulse, energy ring, energy rings, explosion, father and son, fire rodan, frankenstein, frankenstein vs. baragon, ghidorah, the three-headed monster, gigan, glowing, glowing horn, glowing mouth, glowing spikes, godzilla, godzilla (1954), godzilla (series), godzilla vs. biollante, godzilla vs. king ghidorah, godzilla vs. megalon (1973), godzilla vs. monster zero, heart, intestines, kaiju, king ghidorah, lungs, magazine scan, mecha, mechagodzilla, megalon, military, minilla, monster, mothra vs. godzilla, mouth beam, napalm, nuclear pulse, official art, organs, parent and child, plasma, plasma beam, plasma ring, plasmoid, pterosaur, red spiral ray, robot, rodan, scan, science, science fiction, smoke ring, smoke ring (godzilla), steam, stomach, super mechagodzilla, the return of godzilla, toho, uranium heat beam, weapon, x-ray

Rule 34 | anatomy, antennae, battra, biology, bone, brain, breath weapon, breathing lightning, chart, conjoined, cross-section, diagram, drill hand, electricity, energy, energy beam, eye beam, ghidorah, the three-headed monster, glowing, glowing antennae, glowing eyes, glowing horn, godzilla (series), godzilla vs. hedorah, godzilla vs. king ghidorah, godzilla vs. megalon (1973), godzilla vs. mothra, gravity beam, heart, hedorah, hedrium ray, horn beam, horns, intestines, kaiju, king ghidorah, laser, lightning, magazine scan, megalon, monster, mothra, mouth beam, official art, organs, plasma, prism beam, ribs, scan, science, science fiction, toho, x-ray

Rule 34 | alien, alternate form, amputee, anatomy, armor, biology, brain, cannon, chart, conjoined, cross-section, cyborg, diagram, dinosaur, directed-energy weapon, dragon, electricity, energy, energy beam, energy cannon, engineering drawing, gigan, godzilla, godzilla (series), godzilla capture device, godzilla vs. gigan, godzilla vs. king ghidorah, gravity beam, gravity laser cannon, head jewelry, hydra, interior, kaiju, king ghidorah, laser cannon, lightning, machine hand, magazine scan, mecha-king ghidorah, monster, multiple heads, multiple tails, nuclear reactor, official art, one-eyed, organs, plasma gravity beam, production art, prosthesis, prosthetic arm, prosthetic head, prosthetic wing, saw, scan, schematic, science, science fiction, solar panel, solar panel wings, space monster, tail, toho, triple-laser beam, tuning fork, wings, x-ray

Rule 34 | 1girl, 2boys, arc system works, bag, bag on head, bag over head, baiken, battle, bouncing breasts, breasts, dark skin, detached sleeves, facial tattoo, faust (guilty gear), guilty gear, hair over eyes, japanese clothes, kataginu, katana, kimono, large breasts, long hair, multiple boys, nipples, obi, one-eyed, open clothes, open kimono, pangulu, paper bag, pendulum, pink eyes, pink hair, ponytail, sash, scar, scar across eye, scar on face, science, topless male, silver hair, sword, tattoo, translation request, venom (guilty gear), wardrobe malfunction, weapon

Rule 34 | 1girl, beaker, blonde hair, blood, bloody tears, blue eyes, chinese text, eraser, female focus, french text, german text, hat, key, korean text, long hair, monocle, mortarboard, niichi (komorebi-palette), original, pencil, russian text, science, skirt, solo, text focus, thighhighs, translated, vial, zettai ryouiki

Rule 34 | 1girl, aquarius (constellation), beato2528, braid, breasts, brown eyes, constellation, cross, dress, female focus, flask, hat, highres, long hair, nurse cap, red cross, round-bottom flask, science, silver hair, solo, test tube, text focus, touhou, trigram, two-tone dress, yagokoro eirin

Rule 34 | 1girl, animal, bad id, bad pixiv id, bag, book, brown eyes, brown hair, canal, doora (dora0913), female focus, gloves, glowing, head rest, inkwell, kaze no tani no nausicaa, laboratory, lamp, mushroom, nausicaa, quill, science, science fiction, short hair, sitting, smile, solo, table, teto (nausicaa), water, waterfall

Rule 34 | 5girls, amami haruka, ass, blue hair, blush, brown hair, chemistry, chibi, clone, hair ribbon, idolmaster, idolmaster (classic), kisaragi chihaya, long hair, methane, multiple girls, nude, pun, ribbon, science, short hair, simple background, white background, yuri, zwolf79322

Rule 34 | animal, animal focus, black cat, box, cable, cat, ka92, light bulb, no humans, original, schrodinger's cat, science, solo

Rule 34 | 3girls, absurdres, animal ears, azibuda, bad id, bad pixiv id, erlenmeyer flask, female focus, flask, hair net, hat, highres, kirisame marisa, lab coat, laboratory, mask, microscope, monochrome, mortar (bowl), multiple girls, nurse cap, rabbit ears, reisen udongein inaba, science, skirt, thighhighs, touhou, yagokoro eirin, zettai ryouiki

Rule 34 | 10s, 1boy, 1girl, breaking bad, candy, chemistry, crossover, drugs, facial hair, food, glasses, greyscale, hairband, kise yayoi, monochrome, mustache, orz (orz57), precure, science, short hair, sketch, smile precure!, sparkling eyes, sweater, walter white

Rule 34 | 2girls, 4koma, artist self-insert, bag, blue hair, cable, comic, detached sleeves, closed eyes, female focus, frog hair ornament, green eyes, green hair, hair ornament, highres, juliet sleeves, kochiya sanae, long image, long sleeves, mizuki hitoshi, mountain, multiple girls, puffy sleeves, real life insert, science, shirt, short hair, skirt, smile, snake hair ornament, sweat, tall image, tatara kogasa, tears, touhou, translation request, umbrella

Rule 34 | 1girl, black socks, blue eyes, blue hair, bra, breasts, dutch angle, erlenmeyer flask, female focus, flask, hairband, hand on own chest, lab coat, matching hair/eyes, medium breasts, midriff, navel, one eye closed, panties, pleated skirt, school uniform, science, side-tie panties, skirt, smoke, socks, solo, spoken sweatdrop, sweatdrop, tears, torn clothes, underwear, white bra, white panties, wince, yukiwo

Rule 34 | 1girl, against glass, aqua eyes, blonde hair, blue eyes, blush, bottle, breastless clothes, breasts, buruma, buruma pull, cape, capelet, checkered clothes, checkered legwear, cleavage, clothes pull, comic unreal, corset, crown, crying, female focus, german text, giant, gloves, hair bobbles, hair ornament, highres, hood, hoodie, in bottle, in container, jar, kneeling, little red riding hood, little red riding hood (grimm), medium breasts, mini person, minigirl, monster, navel, nipple stimulation, nipple tweak, nipples, nude, open mouth, pantyhose, pantyhose pull, partially submerged, ranguage, rape, runny nose, scan, scared, science, slime (creature), snot, solo, solo focus, stasis tank, tears, tentacles, text focus, tongue, translated, trapped, twintails, water, wavy eyes, wavy mouth, wet, white gloves, xxzero

Rule 34 | 1girl, alternate costume, artist name, bad id, bad pixiv id, belt, blue eyes, character name, coat, diagram, earth (planet), female focus, growingnoob, hat, long coat, long hair, moon, necktie, pantyhose, planet, ponytail, science, signature, silver hair, skirt, solo, space, touhou, yagokoro eirin

Rule 34 | 1girl, beaker, black hair, blonde hair, cable, chair, coat, dark, erlenmeyer flask, flask, fluorescent lamp, glowing, highres, holding, industrial pipe, lab coat, laboratory, lamp, living, original, photorealistic, realistic, scenery, science, standing, trench coat, vial

Rule 34 | 1boy, 1girl, blush, breasts, brown eyes, chalkboard, classroom, game cg, glasses, green hair, hetero, jar, large breasts, long hair, nagasawa mitsuki, nipples, nude, penis, pubic hair, pussy, school, science, sex, sweat, table, testicles, thighs, tsuki possession, uncensored, vaginal, yamane masahiro, zyx

Rule 34 | 1boy, 1girl, blush, breasts, brown eyes, chalkboard, classroom, game cg, glasses, green hair, hetero, jar, large breasts, long hair, nagasawa mitsuki, nipples, nude, penis, pubic hair, pussy, school, science, sex, sweat, table, testicles, thighs, tsuki possession, uncensored, vaginal, yamane masahiro, zyx

Rule 34 | 1boy, 1girl, barefoot, beaker, blush, breasts, breasts apart, brown eyes, chalkboard, classroom, clenched teeth, closed eyes, completely nude, feet, female focus, female pubic hair, female teacher, game cg, glasses, green hair, hetero, indoors, jar, large breasts, long hair, nagasawa mitsuki, nipples, nude, penis, pubic hair, pussy, school, science, sex, sweat, table, teacher, teeth, testicles, thighs, tsuki possession, uncensored, vaginal, yamane masahiro, zyx

Rule 34 | 1girl, ass, black hair, giant, giantess, nude, science, tagme

Rule 34 | 1girl, capelet, female focus, grey background, hat, hat ribbon, kawashina (momen silicon), nagae iku, purple hair, red eyes, ribbon, science, simple background, solo, touhou

Rule 34 | 2boys, abs, age difference, anal, artist request, black hair, blonde hair, bottomless, brown hair, censored, clothed on nude, erection, glasses, lab coat, laboratory, machine, male focus, male penetrated, mosaic censoring, multiple boys, muscular, navel, necktie, nipples, nude, orange hair, penis, science, sex, shirt, sitting, source request, spread legs, white shirt, wince, yaoi

Rule 34 | 2boys, abs, age difference, anal, artist request, bdsm, belt, black pants, blue hair, bondage, bound, briefs, brown hair, censored, clothed on nude, flaccid, forced, frogtie, glasses, holding legs, lab coat, laboratory, machine, male focus, male penetrated, male underwear, mosaic censoring, multiple boys, muscular, navel, necktie, nipples, nude, open clothes, open mouth, open shirt, pants, pants around one leg, penis, rape, science, sex, shirt, sitting, spread legs, string, string of fate, sweat, underwear, white shirt, yaoi, yellow eyes

Rule 34 | 2boys, abs, anal, barefoot, bottomless, brown hair, censored, clothed on nude, cum, cum in ass, glasses, holding legs, lab coat, laboratory, machine, male focus, male penetrated, mosaic censoring, multiple boys, muscular, nipples, nude, open clothes, open mouth, open shirt, penis, science, sex, shirt, sitting, spread legs, sweat, tan, white shirt, yaoi

Rule 34 | 10s, 1girl, breasts, brown eyes, brown hair, devil survivor, devil survivor 2, female focus, large breasts, math, necktie, nitta io, school uniform, science, short hair, solo, taut clothes, third-party edit

Rule 34 | 00s, 1boy, 1girl, back-to-back, bolt (hardware), crossover, doctor, franken fran, franken stein (soul eater), glasgow smile, glasses, heart, lab coat, madaraki fran, medical, scar, science, scientist, screw, soul eater, stitches

Rule 34 | bed, breasts, cleavage, ecchinata, ecchinata (artist), fishnets, fuu (naruto), garter belt, genderswap, genderswap (mtf), girl on top, haruno sakura, hat, highres, hyuuga hinata, hyuuga neji, jar, kakuzu (naruto), knife, large breasts, medical, naruto (series), naruto shippuuden, nurse, nurse cap, scalpel, science, strapped down, tattoo, thighhighs, uzumaki naruto

Rule 34 | 1990s (style), 1girl, 2boys, asphyxiation, bandages, bdsm, belt, bisexual male, black hair, blood, bondage, bound, bound wrists, chain, collar, cuffs, erection, final fantasy, final fantasy vii, glasses, injury, jenova, jewelry, job, lab coat, laboratory, monster girl, multiple boys, necktie, penis, professor houjou, purple tentacles, rape, retro artstyle, ring, science, scientist, shackles, shirt, strangling, syringe, tentaclejob, tentacles, tentacles on male, torn clothes, undressing, vincent valentine, white shirt

Rule 34 | 1girl, another, black hair, blazer, board, bow, chalkboard, classroom, desk, equation, ewestein, eyepatch, female focus, highres, jacket, looking at viewer, math, midriff, misaki mei, monogatari (series), nisemonogatari, pale skin, parody, physics, red eyes, school, school uniform, science, short hair, short sleeves, skirt, solo, translated, vest

Rule 34 | 6+girls, black hair, blonde hair, rabbit, c rikei, computer, everyone, glasses, lab coat, multiple girls, original, science, table, wadapen

Rule 34 | 2boys, anal, blonde hair, book, bottomless, brown hair, classroom, computer, cum, cum in ass, desk, ejaculating while penetrated, ejaculation, erection, hihumi, laboratory, laptop, male focus, male penetrated, multiple boys, office, penis, school, science, sex, shirt, spread legs, testicles, white shirt, window, yaoi

Rule 34 | 1girl, blonde hair, blood, bolt (hardware), cat, crossed legs, cup, drawing, eyeball, female focus, franken fran, glasgow smile, holding, jar, lips, long hair, madaraki fran, okita (franken fran), okita (frankenfran), pantyhose, scar, science, shirt, sitting, skirt, skull, solo, stitches, teacup

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