Gokujou Twins

A 16-year-old girl named Morinaga Sara is typically composed but hides an unattractive laugh due to a past trauma. The trauma stems from a pair of twins who, having grown very attractive, unexpectedly reappear in her life. In another story, Konishi intends to give Valentine's chocolate to her crush, Nakata-senpai, but mistakenly hands it to Makino Shinichirou. Insulted, Makino initiates a contest to reclaim the chocolate before the day ends. In a separate narrative, Mayuri is tasked with teaching a self-centered, wealthy young boy, raising questions about how the situation will unfold.