Other Name: ノックを３回 ; 情人总敲三次门 ; Knock 3 Times ; Knock three times ; Knock wo Sankai ; Knokku wa Sankai
Author: Asagiri Yu
Year of release: 2014
One day a boy, who looks like a kitten to some stands, calls at Manatos door and tells him that from today on hell be his roommate. It isnt long after that Manato "adopts" this boy as his "pet", but this kitty has its own aim. Anyway, while the "kitten" starts suffering under Manatos coldness, he gets more and more in some kind of love quadrangle of the more steamy kind...