Jingu Rei was an actor in his previous life. After dying in an absurdly careless way, he was reborn in a parallel-world Japan.
This world is in the process of merging with others, and no one knows when some strange new world might get stitched into it. Faced with girls from slice-of-life anime who possess mysterious qualities, Jingu Rei remains unmoved. After all, he's cute enough himself.
Don't get the wrong idea. I'm talking about his other body. After being reborn, he gained another female body that he can control at the same time without any difficulty.
The System keeps tempting him to conquer those girls with all sorts of dispensable rewards, but Jingu Rei firmly and righteously refuses. He does occasionally run into a few strange people, but he can't be bothered to get involved. As long as no one messes with him, he won't mess with them.
Then one day, he sees some oddly dressed weirdos making a ridiculous racket about a gas explosion, and realizes how serious things have become. With no other choice, he has to save his own skin by trying to stage one sweet romantic trap after another, so he can conquer the girls as quickly as possible.
This novel is also known as: "An Actor's Double Dose of Self-Cultivation," "I Can't Possibly Be Cuter Than Every Heroine," and "One Soul, Two Bodies: Could You Heroines Stop Getting Jealous of Me?"