Yuya, whose heart races at the visit of his mother's friend and world-class bodybuilder Keiko. Yuya, who hasn't seen her in a while, is captivated by the beauty of her sculpted body... That night, the two rejoice in their reunion and reminisce about old times. Keiko, who had been troubled by her relationship with her husband, is moved by Yuya's pure feelings and ends up giving in to him. The two steal moments together under his mother's nose. And on the night before Keiko leaves, Yuya visits her room...
