Fukujuu Koubi
Hentai
1-3. Yuuretsu Idenshi: Futsuu Danshi no Boku wa Kanojo wo Motokare ni Netorareru (優劣遺伝子～普通男子の僕は彼女を元カレに寝取られる～); kakioroshi, Comic Grape Vol. 96, 99 4. Massage de Oshioki Daisakusen! Namaiki Gal Imouto wo Kuppuku Saseru… Synopsis via AniList