A kid forced to grow up overnight learns to love his baby brother not because he has to, but because he actually does. The show doesn't speed through that. It sits in the quiet moments where resentment becomes tenderness, where a scolding becomes the only way he knows how to say "I'm scared of losing you too." By the end, you realize the whole thing was never about the responsibilities, it was about a boy discovering that loving someone costs more than you think you can afford, and choosing to pay it anyway.

Takuya Enoki is a fifth grader whose mother died in a car accident a few months ago. Their father works the long hours of a Japanese salaryman, so much of the care for his baby brother Minoru falls on Takuya: cooking, sewing, cleaning, worrying and trying to discipline him. He drops Minoru off at nursery school each morning and picks him up again once classes end. Neighbors blame him for Minoru's constant crying, and he watches his friends enjoy carefree free time he no longer has. Takuya struggles to find love for the brother who causes him so much grief, and caring for Minoru brings back warm memories of his mother. The show mixes comedy, drama and slice of life as he learns what family means.