Nomu

The male MC uses his younger brother's VR headset to play a Loli porn game that somehow features the younger brother. Surprise! The game was magical and turned the male MC both mentally and physically into the Loli character from the game, who is now the younger sister of the previously younger brother. Included in TSF no F no Hon Sono 7 (2019/12/30)

A jealous teammate uses a magical hypnosis smartphone app to turn the male MC into a sex-addicted girl both mentally and physically, then has the now female MC use the same app to erase the memories of everyone that remembered she was originally a boy. Why? So the teammate could NTR the MC's girlfriend in front of him/her, which only makes the MC jealous of her ex-GF. Yaoi tag added due to a few scenes of the male MC having sex with other men while under the influence of the app.

Collection of stories dealing with gender change, written by F (TSF no F) and drawn by various doujin artists. Sono 1 (2014/12/30) Cover Illustration: Yotsuba Chika Ore ga Otaku(♂) no Koibito(♀) ni Naru Nante... (俺がオタク♂の恋人♀になるなんて…) by Yotsuba Chika Ore ga Onna ni Natta Hi (俺が女になった日) by Aichi Shiho Tou-san Mago no Kao ga Mitaitte Itta yo ne? (父さん孫の顔が見たいっていったよね?) by Naba Cosplay Swap (こすぷれすわっぷ) by Taniguchi-san Sono 2 (2015/12/31) Cover Illustration: Yotsuba Chika Kojin Jouhou wa Taisetsu ni (個人情報は大切に) by Yotsuba Chika Eroge na Hibi (エロゲな日々) by Labui Waga Tsuma to Nare Yuusha(♂) yo (我が妻となれ勇者♂よ) by Aji Pontarou Imouto Exchange (妹えくすちぇんじ) by Mori Airi Tokushu na Kanojo to Tsukiau Houhou (特殊な彼女と付き合う方法) by Quu Ore, Atashi, Watashi (俺、アタシ、私) by Kamiya Zuzu Gal-iro ni Somaru (ギャル色に染まる) by Hyouga. Sono 3 no Jou (2016/12/31) Cover Illustration: Yotsuba Chika Ochiru Ouji: α to ω (堕ちる王子 -α to ω-) by Yotsuba Chika Imouto Downgrade (妹だうんぐれーど) by Murasakiiro Orange Kikaijikake no Eve: Chapter 1 (機械仕掛けのイブ 第1話) by Haruno Suzune Ore no Osananajimi ga Seitenkan ni Urusai. (俺の幼馴染が性転換にうるさい。) by Taniya Raku Boku wa Succubus? (僕はサキュバス?) by Kurimochi Chizuru Sono 3 no Ge (2017/08/13) Cover Illustration: Kurimochi Chizuru Ore wa Succubus Minarai? (俺はサキュバス見習い?) by Kurimochi Chizuru Gal-iro ni Someagaru (ギャル色に染め上がる) by Hyouga. Kikaijikake no Eve: Chapter 2 (機械仕掛けのイブ 第2話) by Haruno Suzune OtaCir no TS Hime wa Kawaii toiu Kotoba ni Yowai (オタサーのTS姫はかわいいという言葉に弱い) by Byakuya Yuu Fukushuu no Yubiwa (復讐の指輪) by Nomu Imouto Idolize (妹あいどらいず) by Kagura Kurumi Mio TS Dorei Oni (身堕TS奴隷鬼) by Uno Ryoku Eien ni Kimi to (永遠に君と) by Natsumori Fukagasa Sono 4 (2017/12/31) Cover Illustration: Yotsuba Chika Illustration: Hoshino TS Mahou Shoujo Hiromi: Chapter 1 (TS魔法少女ひろみ 第1話) by Yotsuba Chika Ore ga Osananajimi no Koibito ♀ ni Naru Nante Zettai Arienai (俺が幼馴染みの恋人♀になるなんて絶対ありえない) by Hoshina Meito Joou no Kisaki ni Sareta Ore (女王の妃にされた俺) by Nemuri Neko Shirou Onna tte Raku de Ii yo na (女って楽でいいよな) by Poriuretan (ポリウレたん) Musunde Hodoite (結んでほどいて) by Hoshino Sono 5 (2018/12/31) Cover Illustration: Yotsuba Chika Illustration: Kurimochi Chizuru TS Mahou Shoujo Hiromi: Chapter 2 (TS魔法少女ひろみ 第2話) by Yotsuba Chika End:less Nightmare: Chapter 1 by Murasakiiro Orange Inoue-kun no Jijou (井上くんの事情) by Rustle Shoujo stay night (少女/Stay Night) by Taniguchi-san Fukanyou no Daishou (不寛容の代償) by Nomu Trans Blood (トランス・ブラッド) by Kaneko Naoya Mezame (めざめ) by Kanoe Succubus ♀ ni Kyousei Tenshoku Saserareta Ore ♂ (サキュバス♀に強制転職させられた俺♂) by Hoshina Meito Ore ga Osananajimi no Koibito ♀ ni Naru Nante Zettai Arienai: After by Hoshina Meito Sono 6 (2019/08/11) Cover Illustration: Yotsuba Chika Illustration: Reitou Mikan, Etami TS Mahou Shoujo Hiromi: Chapter 3 (TS魔法少女ひろみ 第3話) by Yotsuba Chika Toshiue e no Doukei (年上への憧憬) by Nomu Seikishidan Jewel Knights: Chapter 1 (聖騎士団 ジュエルナイツ 1話) by Kouji Nikusa Amatte Kawasa Hyakubai! (憎さ余って可愛さ百倍!) by Yonezou Saimin Choukyou Eroge no Heroine ni Tensei Shite shimatta Ore wa Kouryaku Sarezu ni Nigekiritai! (催眠調教エロゲのヒロインに転生してしまった俺は攻略されずに逃げきりたい!) by Reitou Mikan Haruka Kanata (ハルカカナタ) by Morishita Mao Yuusha to Maou Gense de JK Yattemasu! (勇者と魔王現世でJKやってます!) by Kaneko Naoya TS Musume ni Natte Onnanoko to Ichaicha shitai kedo Hazukashikute Dekinai node ̄Ichioshi shite kure (TS娘になって女の子とイチャイチャしたいけど恥ずかしくてできないので一押ししてくれ) by Fukuoka Taro Sono 7 (2019/12/30) Cover Illustration: Nomu Imouto VR (妹ぶいあーる) by Nomu 2 Seikishidan Jewel Knights: Chapters 2 (聖騎士団 ジュエルナイツ 2話) by Kouji Seikishidan Jewel Knights: Chapters 3 (聖騎士団 ジュエルナイツ 3話) by Kouji Seikishidan Jewel Knights: Chapters 4 (聖騎士団 ジュエルナイツ 4話) by Kouji Mesuinu Falling (メス犬 Falling) by Kanmuri Sono 8 (2020/09/20) Cover Illustration: Nomu Shouwaru Iinchou(♂) wo M-jouka Choukyou (性悪委員長♂をM女化調教) by Nomu Yakyuubu no Moto Ace(♂) wa Sei Shori Pet(♀) (野球部の元エース♂は性処理ペット♀) by Nomu Trans Conversion Case. I (トランス・コンバージョン Case.I) by Kamiya Zuzu Maou wo Kyuusai suru Houhou (魔王を救済する方法) by Mugen no Sudadokei Mikai no Kotou de Buzoku no Ichiin♀ ni Natte Shinyuu no Yome ni Natta Ohanashi (未開の孤島で部族の一員♀になって親友の嫁になったお話) by Hiiragi Popura Kisekae Appli de Kawaiku Henshin! (着せ替えアプリでかわいくへんしん!) by Sasami Sono 9 (2021/12/31) Cover Illustration: Yotsuba Chika Kitsune e Yomeiri (狐へ♂→♀嫁入り) by Yotsuba Chika Imouto Role Change (妹ろーるちぇんじ) by Nomu Sonzai Kaihen Appli: Jibun no Imouto ni Kaerareta Ore (存在改変アプリ～自分の妹に変えられた俺～) by Nomu Inma Abrahel Koutan (淫魔アブラヘル降誕) by Mugen no Sudadokei Onna ni Natta Ore wa Shinyuu no Risou no Kanojo? (女になった俺は親友の理想のカノジョ?) by Betty Sono 10 (2022/12/31) Cover Illustration: Hiiragi Popura Yuusha Aku ni Ochiru: Ryuu Hime Meifa no Kakusei (勇者悪に堕ちる～龍姫メイファの覚醒～) by Hiiragi Popura Okatai Anata♂ wo Yawarakaku♀ (おかたいアナタ♂をやわらかく♀) by Betty Okatai Anata ♂ wo Moto Yawarakaku ♀ (おかたいアナタ♂をもっとやわらかく♀) by Betty Fumajime Yuusha no Saikyouiku (不真面目勇者の再教育) by Betty Ubawareta Tachiba ~Ou Kara Ouhi Eto Kaerareta Ore (奪われた立場～王から王妃へと変えられた俺～) by Betty CosChan! Cosplay Gal♀ ni Kaerareta Boku♂ (こすちぇん! コスプレギャル♀に変えられた僕♂) by Kagura Kurumi