Ko-chan, a quiet man in his 40s, enjoys games and comics. His peaceful life is disrupted when his cheerful and active university student nephew, Tatsuki, moves into his apartment. Tatsuki, a rugby player, was forced upon Ko-chan due to his brother's reckless behavior. After six months of this cohabitation, Ko-chan, who dislikes noise, finds the situation unbearable and contemplates how to end it.