(What on earth is wrong?) Recently, his stepmother Yuka has been acting strange. As soon as his father leaves the house, she puts on makeup and sneaks out somewhere, only to come back tired in the middle of the night. Tormented by guilt for having suspected Yuka, Wataru heads out to a brothel to clear his mind...and to his surprise, it's Yuka herself who appears! Yuka stops Wataru as he hurries off to leave, but...