Maya, a defenseless loli-loli girl, and her younger sister, Miya, a beautiful woman with glasses, are childhood friends who live next door to Noboru's house. Noboru, who has loved his older sister Maya since they were young, suddenly confesses to him and is worried about how to respond. Noboru ends up alone with Maya, who is wearing a naked apron, and ends up having sex with her... A heart-pounding love triangle is set in the coffee shop "Romansu"! A captivating heartfelt love comedy!!