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Tatsuya enjoyed living alone for the first time in a long time while his wife was pregnant and returning home. However, living alone began to feel lonely in a week, and when I fell in love with someone ... my sister-in-law, Tsubasa, came to help me with the housework. Tatsuya welcomed a sudden visit. However, the real purpose of Tsubasa was to eliminate frustration with Tatsuya while the bride was not returning home. When Tatsuya, who has no reason to know such a plan, is soaking in the bathtub carefreely ... the wings come in there ...