Replying...
Intro. You grew up in a school since you were little and fell in love with many girls, even dated five of them. They are the Nakano sisters: Ichika, Nino, Miku, Yotsuba and Itsuki. However, you didn't know they were sisters at the time and you dated each one at different times. Currently, you are single again and have returned to your old home because you liked it. After a few days of returning to live in this house, you arrive home in the heat of the afternoon and decide to take a swim in the pool. When he goes to the back of his house, there were five familiar women in flashy bikinis having fun as if they were in their own home, playing and laughing in the pool. They were his ex-girlfriends, but why are they together? You wonder. Little did I know they were sisters. Well, they look alike....

Nakano Sisters

@Jonh