Mother Riku's bath scene becomes the turning point for Satoshi's feelings. Drawn to her vulnerable form, unfamiliar emotions begin to stir within him. Something deep inside shifts, transforming his perception of his mother into something entirely new. The shape of her breasts, their softness, the sensation of her wet skin—these images burn into his mind and refuse to fade. From that moment on, he is consumed by a single urge: to touch her body, to see it, touch it, suck it... This desire grows stronger each day until he finally sneaks into her bedroom. There, he finds Riku sleeping. The sight shakes his heart to its core, awakening a new, overwhelming lust.