The boys wonder if they're taking advantage of Sunako's cooking, and get a job at a fancy restaurant in order to lessen her burden. Kyohei wishes to eat nabe at a kotatsu, as he has never experienced the winter tradition. Kyohei goes shopping with Sunako, only to have the entire marketplace misunderstand their relationship. To add thing up Kyohei's fangirls appears and play around their grocery. Kyohei later lends a shopkeeper a helping hand, in return for some vegetables. Meanwhile, Sunako goes out to construct a kotatsu. In the end, they end up having an enormous kotatsu feast.

Ranmaru receives a phone call from his father, who tells him that he is engaged to be married. Determined to break the engagement, the four bishōnen plot to make Ranmaru someone unworthy to be a husband. However, to no success, Ranmaru's fiancée, Tamao Kikunoi begins to take a liking to Ranmaru's imitative personalities. However, she begins to realize that Ranmaru has no interest in her. Feeling guilty, Ranmaru visits Tamao's school grounds to apologize, but he is raided by other girls Ranmaru has dated. It is later revealed that Tamao truly wants to marry him.

On Valentine's Day the four bishōnen are bombarded with cards, gifts, and boxes of chocolates from a crowd of female students. The boys do all they can to escape the madness from the lovestruck girls. Meanwhile, Sunako seems to have an obsession with chocolate, going out of her way to acquire as much as she can.

Kyohei is seen eating in various restaurants, as he chose to run away since Sunako does not what to be around him. However, it is revealed that Sunako seems more depressed than usual. The three boys, along with Sunako and Noi, try to convince Kyohei to come home via television broadcast. However, Mine becomes furious when she misunderstands Kyohei's position with Sunako.