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New Year's seat where all relatives gather. Greetings are all right, sake and treats are served, and the inside of the house is completely in a banquet mood. However, in the meantime, only one pair of parents and children was not calm in their hearts ... The aunts and nephews of the Yabe and Nanami families who have had a relationship for a long time. The four, who had no way of knowing that their parents and children were actually in a physical relationship, were looking forward to today's day when they could meet only once a year. Two groups who try not to get caught by other relatives ... But unfortunately, they get into a mess and finally know all the truth ...