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Masao, the second son, catches a cold, and Ryoko is always there to take care of him. One day, Tatsuya, the eldest son, visits the house to see how Masao is getting better. A mistake she made a few years ago... Ryoko was actually in a relationship with Tatsuya. And Tatsuya asks for his body again... Masao catches a glimpse of the situation, and the unbelievable sight makes him catch a cold again. And then Ryoko realizes Masao's pure feelings for her...