A Haji solo story, prior to the events of the TV series. In Hong Kong, a police detective named Nishitatsu Yoshi investigated a string of murders in which the victims died due to loss of blood. During the investigation, he encountered a mysterious man who may have a connection to these incidents. (Source. MAL)    

Mirai Fukuin is a side story of Kara no Kyoukai novel series. It's about two psychics, Seo Shizune and Kuramitsu Meruka, who can foresee the future. Shizune was sick of her predictable boring life and Meruka became a professional bomber taking advantage of his supernatural power. When Shizune met Mikiya and when Meruka met Shiki, their immutable future started to change. This book also includes three short manga episodes. (Source: MAL)

Onani means masturbation. And that's what this guy is good at. Every day after school, he sneaks into the mostly unused girls bathroom on the 3rd floor, and masturbates. Until one day when he's caught...This is a story of mistakes, redemption, and the choices made in between. It contains the worst and best of the human condition.  

Takes place two years after the school trip they took in middle school. Prequel: Onani Master Kurosawa

Featuring Ayase as the main heroine.