"I'm sorry, what?" I asked, still not fully grasping the words I was told. "You will guide Monkey D. Luffy through the world of One Piece as his guardian." Maylene Kaneko gets isekai'd into the famous manga and anime One Piece to guide Luffy to where he needs to be.

Luffy has never been in a relationship but he was curious about it so he asks you to act as his girlfriend to know what it feels to be in a relationship