Shota is only in high school, yet he has been battling thinning hair for the past few years. He cannot confide in his family or his best friend Sachio, nor does he find the courage to ask out his crush, Shinohara Ami, fearing she might discover his secret. Then one day, the clumsy science teacher Mai approaches him and offers to solve his hair problems. Shota is very skeptical at first and avoids her, but as the issue worsens, he desperately turns to Mai as a last-ditch effort.