Atsushi was Akutagawa's roommate for just over four months, and during those four months he used pheromone blockers to hide the fact that he was an omega... however his heat was about to start.

Atsushi stayed in his room, curled up in his nest. He had a suppressant patch on his thigh, hoping his heat wouldn't come early.

He jumped when he heard Akutagawa knock on the door before opening it. He forgot to lock the door.