I: Episode 0
Preferably read sequel before this Sequel : http://www.mangago.me/read-manga/itou_san_kuraka_sui/
Otameshi Delivery Lover
Saiyaku Wa Boku O Suki Sugiru
59 Two guys bound with misfortunes from past life
Hidamari ga Kikoeru
Vol5 ch 5.5 Kouhei has hearing disability but he can hear the voice of only person clearly. This is one of my absolute favourite mangas
Ubawareru Koto Marugoto Zenbu
Sequel : http://www.mangago.me/read-manga/suki_toiunoni_nazekashira/ Timeline of Cheating Series : 1 Ubawareru Koto Marugoto Zenbu - Takao (Big Tit Fetish) x Yoshinaga 2 Suki Toiunoni Nazekashira [Spin-Off of 1] - Yuuichi (Chef) x Takehisa(Boss) 3 Ai ga Matteru [Spin-Off of 2] - Focus on Kiyohito (Yuuichi's ex-boyfriend) 4 Ai ga Aru Kara Ii ja Nai [Sequel of 1] Takao graduated & opened a store /w friends. 5 Itsumo Anata no Koto Bakari [Spin-Off of 2] Closet gay, Keika blackmails Yuichi Note Ubawareru Koto Marugoto Zenbu (Prequel) Weak Sadist (Sequel) - (in Suki to Iu no ni Naze Kashira- extra)
Asterisk
One of my most favourite mangas
Gosan no Heart
Sequel (spin off - udou's brother) : http://www.mangago.me/read-manga/owaranai_fukou_ni_tsuite_no_hanashi/
Itou-san (KURAKA Sui)