This novel is honestly so much fun! The MC is someone who lives in an apocalyptic world and he gains a teleportation skill which allows him to jump to a different version of Earth. This leads him to take over his own identity and take advantage of the fact there is cheap food in the normal world, and brings it back for his family in the other world. One of the best aspects of this is that because it's a parallel world, his family and friends are in both worlds.... more>> So you get to see him have a different dynamic with both of them.

While there are a lot of love interests cause this has a harem aspect to it, if you ignore it it's pretty fun. The MC ab*ses his teleportation ability to also investigate criminals because in the normal world he works as a detective, but in his original world he's like a soldier. Leading to him being able to ask a victim about for example a past stalker who was also in the normal world. Making him be able to recognize and arrest him in the normal world.

There's also an entertainment industry aspect because he "composes" songs for his sister. When in reality he just asks his original friend for songs to bring to the normal world. <<less