Yachin Hanbun no Ibasho desu.

Summary

"Want to come to my place?". Despite being a little offended by those words, Shiraishi accepted Kanzaki's kind offer and thus, they began their co-inhabitant and living under the same roof. Shiraishi, a hardworking college student with a smile that never leaves his face was actually worried about his boyfriend's unfaithfulness. And no one else he could talk to about that matter except his co-worker, Kanzaki. He thought that the co-inhabitant proposal Kanzaki proposed to him was just a friendly offer, but the truth is… (Source: Shinmakoku Scanlations)