Puberty Syndrome: abnormal pheromones which, according to rumours online, are caused by the emotional turbulence of adolescence. Sakuta Azusagawa, a high school student studying near Enoshima, meets several young girls suffering from Puberty Syndrome. One of them walks around the library in a bunny costume. Her name is Mai Sakurajima, a senior student who is taking a break from her acting career. Inexplicably, Sakuta is the only one who can see her. How did she become invisible? As Sakuta searches for answers to Mai’s situation, they end up spending more time together, and he begins to understand the feelings she’s been concealing. Set in a city where blue skies meet the calm sea, this story follows Sakuta as he meets a series of young girls, each one more mysterious than the last.