There's a hentai game I'm trying to find. The story is about 2 couples taking part in a kind of game. They exchange girlfriends and go into different rooms to fulfill tasks. There're always 2 options for the male MC - to complete each task with or without cheating. The same goes to the MC's girlfriend story but depending on the MC's choices. They're different endingss depended on the actions MC has taken - everything can be just normal (NTR is avoidable), all 4 can stay in relations but cheat on each other or they can just swap partners