As a Physical Education substitute teacher, Tomoya returned to his alma mater and once again encountered his old arts instructor, Kousuke. Unfortunately, things took a turn for the worse when Tomoya accidentally shattered Kousuke's cellphone, souring his day. Despite his reluctance, Tomoya agreed to team up with Kousuke for the following four months. It remains to be seen whether their joint effort will lead to positive or negative outcomes.