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Satoshi visits the Harada family for the first time in a while to see his uncle, who has been on good terms since childhood. However, as soon as I got home, an uncle in a suit came out of the front door. Apparently I have to go out on a sudden business trip. "Mina, don't ask for Satoshi." Satoshi is puzzled by the unexpected development of spending the weekend alone with his aunt Mina, who was left behind. And then an incident happened...