Vygotsky Sociocultural Theory

(COMIC1☆17) [Shinnihon Pepsitou (St.germain-sal)] Chun-Li Sousakan Sennyuu Sousa Kiroku ~Sou (Street Fighter)

A Professors Theory on Love and Sex Reassignment Surgery

FORTUNE ARTERIAL 完結編

[Koutarou] B☆B☆IDOL [English] [Fated Circle + Doujin-Moe.us]

Tomodachi no Onna

Juukan Kyoushitsu -Shibayan-

[Gambler Club (Kousaka Jun)] LET'S Ra MIX (Card Captor Sakura, Bakusou Kyoudai Lets & Go!!)

(C93) [Usamimi Syndrome (Erutasuku)] Ore dake no kuso Aniki (Dragon Quest XI)

(C66) [SUBSONIC FACTOR (Ria Tajima)] The steady-state theory (Fullmetal Alchemist)

Dungeon Travelers - Sasara Himegoto 3

Harameite Kirakira Hoshi

[Crow_Theory of Heaven] Gurren Lagann Shimo-kyun Haa Haa Hon Hadaka Negai (Gurren Lagann) [Raw]

Naedoko Elf

Soutaisei Virgin Theory

(C91) [Yakiniku Teishoku (Harami)] Hoshii Miki no Makura Eigyou!! (THE iDOLM@STER) [Chinese] [星井美希老公漢化]

[Hazuki Kaoru] Toudai Juken Senmon Ryou Aa Tsubame Sou

[Tuna Empire] OMA-JYU [Chinese]

Empty Theory 1 - After Pleasure

Empty Theory 5 - Advantage

Gaticomi Vol.39

(C80) [PURIMOMO (Goyac)] SHITUJI san tasukete Lucky sukebe! (Mayo Chiki!)

Happy theory

Tiegenhoff Kikango ni + Omake bon | After Returning To Tiegenhoff Kikango + Extra Book

Empty Theory 6 - Hearts Scheme

Shiru-Mamire Yagai-Koubi Nikusyoku-Duma | Juice Covered Outdoor Mating Carnivorous Wife

[Hadairozanmai (Mitei)] Imouto to Ofuro ni Haittara | When I Enter the Bathtub with my Little Sister [English] [Degenerate_X] [Digital]

[Gururi] [Takukamu] Anya no Yume (Fire Emblem Fates)

(Knights Theory) [Snow Peach (Mipoko)] Naru no Anal kara Inspiration ga Waite Kuru zo (Ensemble Stars!)

(C64) [Kokushi Tenshi (Various)] SPACE STRING THEORY (Uchuu no Stellvia)

Kodomo no Riron | A Kid’s Theory

(CT14) [Shochikubai (Otakehiko)] Oujo no Shiren (Yu-Gi-Oh! OCG)

(C78) [Kinokonomi (kino, konomi)] Kinokothical Theory (Various)

Nishikino Maki Oppai Festival

Elements1 - Theory

八極鋼管舞

Benmusu Omnibus Vol. 1

[Ayano Naoto] Body and Soul

(Go! My Master ver.Girl) [Morohane. (Tatejima.)] Under Line (Fate/Grand Order) [English] [Squigglesjp]

(SUPER24) [Saltblow (Hashira Sio)] milk of spirit (Yowamushi Pedal)

[Herohero Hospital (Herohero Tom)] Hotondo Hanashita koto nai Baito-saki no Senpai ni GyakuRe sareru Hanashi [Digital]

(C82) [MuraMura Pocky (Kasumi)] MIDSUMMER (Puella Magi Madoka Magica) [English] [Yuri-ism]

(Dai 10 Kai Hekigai Chousa Haku) [Kiseki (Kisaki Noah)] Usaginosippo ha onedarijyouzu | This rabbit is really good at using her tail to beg (Shingeki no Kyojin) [English] [EHCove]

(C82) [Okadatei (Okada Kou)] Bukiyou na Hito

Rinjin zetsurin oyaji no NTR saimin chōkyō ~ tsuma ga harama se rareta ohanashi

マコト=ナナヤちゃんは発情期

Kougyaku Les Couple | Anal-Lesbian Couple

FGO Ritsuka Fujimaru 03

(C79) [Applesauce (Sada Ko-ji)] Seikan Plugsuit 2 Kaikan Jigoku Book (Rebuild of Evangelion)

[SHINSHIN] Shinshin Nijigenron | Mind and Body Two Dimension Theory

(C92) [Koniro Drops (Morishima Kon)] Rironjou 3-patsu made nara Taeraremasu. - In Theory You Can Tolerate up to Three Shots (Splatoon) [Chinese] [沒有漢化]

Kenka Saikyou Kinniku JK ga Biyaku Nomasarete Bonyuu Fukidashite Haiboku

Maji de Watashi ni Koi Shinasai Visual Fan Book

Ano Hi Yakusoku shita yo ne

[Ootani Mikoto] Seishun Kanjouron - youth emotion theory [R18 Ban] 1

HouseHold Affairs 【卞赤鲤个人汉化】1~33话（持续更新中）

(Bokura no Love Live! 25) [Kitaku Jikan (Kitaku)] Yakimochi (A) Symmetry (Love Live! Sunshine!!) [Chinese] [ことほのうみ个人汉化]

Nagisa no Kasshoku Musume 3

(CR31) [Majimadou (Matou)] Mei-Kai (One Piece)

[mdo-h] DEVIL'S BORN (Soutaisei Virgin Theory) [Chinese]

[FANTASY WIND & CHIBIKKO KINGDOM] Arakawa Seiharu Hakusho (Arakawa Under the Bridge)[ENG]

[Kuroiwa Menou] Hitozuma Club Bijo to Yajuu-tachi (COMIC HOTMILK 2020-05) [English] {The Ancient Hentai Theory} [Digital]

夏娘 総集編

[Shoryutei Enraku] Seishin Kaihouron | The theory of releasing your real self (Nozoite wa Ikenai 7 - Do Not Peep! 7) [English] [Quick and easy translations]

K's Theory

Ore-tachi no Koto o Chinchin made Zenbu Homete Kureru Onnanoko no Ero Manga no Dounyuu to sono Ero Manga

(SC28) [Narashino Kaitoudan (Musasiya Chogenbo)] Kaminaki Tsukiyo no Gensoukyoku Daini Gakushou (Kannazuki no Miko)

COMIC Shitsurakuten 2013-11

A Kid’s Theory

(COMIC1☆6) [Crazy9 (Ichitaka)] Zessica no Koufukuron | Zessica's Theory of Happiness (Aquarion Evol) [English] [biribiri + Doujin-Moe.us]

(C93) [PRETTY MAIDS (Itou Mine)] Himitsu no Yoshiko-chan (Love Live! Sunshine!!)

(C94) [SeaFox (Kirisaki Byakko)] Anehime Hahahime Hebihime (Fate/Grand Order)

Empty Theory 3 - Cousin

(C95) [Hizatora (Kageshio)] ACTING LIKE (Fate/Grand Order) [English] {The Ancient Hentai Theory}

(C92) [Fuyunonchi (Fuyuno Mikan)] Little sister with grande everyday 2 [Chinese] [沒有漢化]

(SPARK10) [AQUARIUM (Moriko)] Mayonaka Hitori (Yowamushi Pedal)

[Spiritus Tarou] Shimekiri-Giri-Giri Threesome (COMIC Anthurium 2019-12) [Chinese] [Digital]

Iinari Princess, Chapter 2

Soutaisei Virgin Theory

(C92) [Koniro Drops (Morishima Kon)] Rironjou 3-patsu made nara Taeraremasu. - In Theory You Can Tolerate up to Three Shots (Splatoon)

The Best Time for Sex is Now - Chapter 1 - Be Brave

Namaiki! 2017-07 [Digital]

(C86) [Urakata Honpo (SINK)] Urabambi Vol. 49 Kaa-san wa Boku ga Shiranai Uchi ni Omanko ni DoHamari shite mashita. (Gundam Build Fighters)

(C88) [aka (Cevoy)] Warawa no Yome (Fire Emblem if) [English] [constantly]

[Akifuji Satoshi] Tsunagareta Ashita Hikisakareta Mirai (Detain the Tommorow, Tore up the Future)

Yun Ying

(C85) [Cat Food (NaPaTa)] Shiburin-ppoi no! (THE IDOLM@STER CINDERELLA GIRLS)

Yoidore Share Kaifuku

(SC2015 Autumn) [CHRONOLOG, D.N.A.Lab. (Sakurazawa Izumi, Miyasu Risa)] Super String Theory (Kantai Collection -KanColle-)

Empty Theory 7 - Destroyed Family

Kimi to no Shukumeiron - The theory of fate with you. | 與妳的宿命論

愛月撤灯

Rem no Koufuku H Ron | Rem's Happiness H Theory

Mama to Ayumi-san ni Shibori Torareru Musuko no Hanashi |The Story About a Son Who is Exploited by His Mom and Ayumi

(C93) [ASTRONOMY (SeN)] Kiyohii no Hon (Yon) | Kiyohii's Book (Four) (Fate/Grand Order) [English] {Doujins.com}

Empty Theory 4 - Well Definitely Meet Again

Orcs and juvenile ω love evolution theory

Haramachi 22

Meimetsusuru Heya

[Suzuki Hiromichi] Enjou Hitoduma - Amorous Wife

Mayonaka no Gohoushi | 深夜中的侍奉

Sexless Kaishouyaku

(C91) [Camrism (Kito Sakeru)] Orange Wristband II (THE IDOLM@STER CINDERELLA GIRLS)

Big Breasts Flat Theory

(Gensoukyou Summit) [Binmalo (Beti)] Suku-Mizu DE Ecchi na Patchouli wa Suki desu ka...? - Do You Like Sexy Patchouli with Suku-Mizu? (Touhou Project)

(C92) [Beberoncino Sei (Betty)] Mitsumeru Sono Saki ni Kimi no Sugata (Kantai Collection -KanColle-) [Chinese] [胸垫汉化组]

Te o Tsunaide, Goshujin-sama

(C95) [OrangeMaru (nodoco)] Christmas no Seishouseki (Fate/Grand Order) [English] {The Ancient Hentai Theory}

Houkago Nekousa Time

(C95) [Gyuunyuuya-san (Gyuunyuu Nomio)] Yumemiru Anaru-chan - Dreaming Girl ANARU [English]

[Fatalpulse (Asanagi)] VictimGirls 19 JEZEBEL AMAZONES (Dungeon ni Deai o Motomeru no wa Machigatteiru Darou ka) [English] [2d-market.com] [Decensored] [Digital]

Succubus-san to Boku no Natsuyasumi