Futsutsukamono no Ani desu ga

A high school girl named Shino Tadakoro leads a normal life filled with relationships and friendships. She keeps her younger brother Tamotsu, who rarely leaves the house, a secret from everyone, including her closest friends. Tamotsu, unaware of the trouble he causes, unexpectedly announces his decision to stop being a shut-in. This leads to a story about the challenges of adjusting to change within a family.