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. Double Snake
A former gangster has turned into a regular office worker, but he still sleeps with his gangster lover. But one of the newbies doesn't like the fact that his favorite 'boss' is having a relationship with an office worker.