Parallel World WIfe Swapping

A game where heroines from five previous works get swinging in a new world! [Story] Kousuke and Ai have been dating for a year now. But as theyre going at it, a light envelops their bodies! When they open their eyes, they find that theyve been transported to another world... along with even more people. The only way back is sexual energy, but where does that come from? Take a guess! Just a little exploration, but no battles.