Two months ago, Takuya Enoki's mother passed away in an accident leaving him to take care of his baby brother, Minoru, while their father works the long hours of a Japanese "salaryman". Takuya must sacrifice playtime and childhood to take care of his brother and do the responsibilities an adult would have: cooking, sewing, and scolding while trying to find it in his heart to love the brother who is causing him so much grief.