Anohito to Nitenai Kuchibiru

Collection of short stories: 1. Anohito to Nitenai Kuchibiru Kaji was in love with his sempai for years but his sempai got married and had a child. Kaji takes care of the kid and watches him growing up... 2. Kuchibiru kara Biyaku sequel to the above 3. Blood 4. Kagari Oni 5. Datenshitachi no Yoru 6.