I really loved this. One of the best I have read.
Oosawa is a single father who overworks himself while looking after his daughter. He and his wife are divorced and she lives with her boyfriend. Yoshioka is a customer at the restaurant that Oosawa works for and playboy. He always have different boyfriends and hits on Oosawa all the time. When Oosawa's daughter caught a cold it was Yoshioka who offered to help since he lives right next to the shop while Oosawa lives far away.
Sorenari ni Shinken nandesu