Tenai, who entered the Sevenjima family as a stepmother, has a good relationship with her husband but struggles to get along with her stepson Yasuto, who is in his teens. The two of them are always somewhat awkward with each other. Just then, her husband goes on a business trip. Tenai finds herself alone with Yasuto and tries her best to get along with him despite her anxiety. However, Tenai's alluring body and unguarded charm have already driven Yasuto mad...
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