Corporate secretary Shirotani suffers from obsessive-compulsive disorder. One day he meets Kurose, a therapist who offers to take him through a ten-step program to cure him of his compulsion. As the two go through each of the ten steps, Shirotani's attraction to his counselor grows.

Shirotani begins opening his heart to Kurose, until the counselor suddenly tells him that their sessions are over. Shocked, Shirotani withdraws into his home, refusing to leave. Then, out of the blue, Kurose texts him and asks to see him. What will Shirotani do when he finds out the secret Kurose has been hiding from him this entire time?