Sakurai's wife comes to get the divorce papers that he won't give her. She leaves, giving Shio the advise to confess, because her husband will recover knowing that he is needed by someone, so Shio decides to write a love letter that she will hand over to Sakurai on Valentine. However, due to some happenings, it's the letter Shio's brother wrote for his girlfriend, so Shio decides to tell Sakurai her feelings directly. Tappei tries to avoid that and in the end confesses to Shio by himself. (Source: kisskh)