Since her husband passed away, Eiko has been single-handedly raising her son, Hiroshi. Although he is not exactly handsome, Eiko loves him because he is very obedient and healthy. However, Hiroshi has one flaw... He is not good at mornings. One day, despite Eiko waking him up, Hiroshi overslept on an important day. The two of them had a big fight over this. They didn't even speak to each other for several days... but then something happened that made Hiroshi realize how grateful he was to Eiko...