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(I wonder what the hell is) My stepmother Yuka has been acting strange lately. As soon as my father left, he puts on makeup and secretly heads out somewhere, and returns home in the middle of the night looking tired. Tormented by the guilt of suspecting Yuka, Wataru heads out to a sex industry to relieve this writhful feeling... and it turns out that Yuka herself appears there! Yuka stops Wataru from leaving in a hurry, trying to leave...