The ultimate cute and sexy romantic comedy!! Nishimura Chizuru, the woman he has admired since childhood, moves in next door to the lazy Sakai Katsuya... and with her 15-year-old daughter Mizuho! Even though he has an older girlfriend, Hayashi Asuka, Katsuya calls Chizuru "Chizu-nee" and adores her, and his sexy fantasies skyrocket. Frustrated by having to endure the advances of a drunk Chizu-nee and unable to have sex with Asuka because she is busy with work, Katsuya ends up having a relationship with Kashiwagi, who was in the same club as him at university. What will happen...? A slightly bittersweet rhapsody of youth drawn by Mutsumi Tsutomu.