Rin, a married woman and mother, has always dreamed of going to Hawaii since childhood, and this year she passionately wishes for it to come true. She lines up her swimsuits and puts on a fashion show, her figure embodying the very image of tropical fantasy. Just then, her son Tohru arrives and is captivated by her surprisingly revealing bikini look. Understanding his mother's longing, he suggests giving her an oil massage to help her experience the feeling of Hawaii. As Tohru touches Rin's alluring body for the first time, his excitement becomes uncontrollable. His hands naturally slip beneath her bikini, and their relationship begins to transform into something new.