As his mother goes away on a trip, her friend Luisa offers to take care of him. Shinji's eyes sparkle at the thought of starting a new life filled with passion alongside Luisa. She has a refined, elegant appearance that complements her slender, toned body. Despite being around the same age as his mother, she maintains a flawless nude figure that he can't help but want to see. While trying to catch a glimpse of her in the bathroom, he accidentally spots her fresh, revealing lingerie hanging nearby...

旅行に行く母の代わりに母の親友・ルイサが世話をしてくれるという。突如として始まったルイサとのバラ色の生活に目を輝かせる浩司。気品のある端正な顔立ちに磨き抜かれたスレンダーくびれボディ。母と同年代とは思えない完璧な裸体をどうしても一目見たい浩司は浴室を覗こうとするのだが…脱衣所でたまたま脱ぎ立てホカホカの新鮮な下着が目に入ってしまい…。