Kurose is an assistant in a psychiatry clinic. Shirotani works in a company and has a mysophobia which is basically a fear of bacteria - he hates touching stuff and desinfects everything, he cleans his hands to the point he starts to bleed and so on.
The story:
One day Shirotani and hiss boss are in a car and an accident happens. Hiss boss ends up in the hospital. The one who saved the boss is Kurose who drove on the bike at the time of the accident. Shirotani is asked by hiss boss to compensate Kurose but Kurose ends up "confronting" Shirotani about his mysophobia. Then Shirotani goes to a psychiatry clinic. He meets Kurose in front of the building and finds out that Kurose is an assistant at the clinic. Thus Shirotani's treatment of his mysophobia by Kurose and their relationship begins.
Ten Count