Ki ga Au to Iu Koto wa
Yachin Hanbun no Ibasho desu (Adapted from) Ki ga Au to Iu Koto wa (Spin-off) (Prequel) Kiga Au to Iu Koto de (Spin-off) (Sequel) Sorenari ni Shinken nandesu. (Spin-off)
Kiga au to iu Koto de
Yachin Hanbun no Ibasho desu (Adapted from) Ki ga Au to Iu Koto wa (Spin-off) (Prequel) Kiga Au to Iu Koto de (Spin-off) (Sequel) Sorenari ni Shinken nandesu. (Spin-off)
Kingyo no Koi
Kirakira no Hibi (Main Story) Kamatte Kawaii Hito (Side Story - Included in Kirakira no Hibi) Kingyo no Koi (Spin-off Story of Ayumi and Chiaki from Kirakira no Hibi)
Domestic na Kanojo
Terrible, Terrible ending. Great art, Seriously bad ending. One of the manga I regret reading.
Kimi Ga Koi Ni Ochiru
Kimi ga Koi ni Ochiru (Prequel) (Haru & Tsukasa) Kimi ga Koi ni Oboreru (Sequel) (Reiichirou & Jinnai) Kimi ga Koi ni Midareru (Sequel) (Kijima & Ichikawa Yuzuki)
Koimonogatari