Kare to kare no ijiwaru na kyori
Complete | Narusaka Rin | 2000 released
Sequel to Kare No Tokubetsu Na Kare. Definitely better than its prequel!
Koi Ni Nare!
Complete | tsukimura kei,itsuki kaname | 2011 released
Sequel/Spin-off to Koi Nanka Shitakunai. The timeline is the same. The friend's and sensei's story.
Kare No Tokubetsu Na Kare