Hatsukoi Made no Unnatural
Sakuya is not good with scary things. One day, he sees a strange figure in front of his apartment and calls out, only to discover it’s Kyousuke, a senior from his college days. Despite Sakuya's initial fear, he invites Kyousuke in but soon realizes that Kyousuke enjoys teasing and threatening him. To Sakuya's surprise, Kyousuke seems thrilled to learn that the apartment is a "stigmatized property"...!?
(Source: Fleur Comic, translated)
Note: Chapter count includes 2 extras.
