Sakuta continues to investigate the cause of Mai’s puberty syndrome. Somehow, he also ends up scheduling a date with her. On his way to meet up with Mai at Fujisawa Station, he comes across a lost girl, who he tries to help out. But instead, he is mistaken for a pervert by another girl and winds up being late to the date. Mai eventually forgives him and they go on with their date, but she decides to change their plans and takes Sakuta to Shichirigahama instead…