The Tatami Galaxy

──What defines us is not the possibilities we have, but the impossibilities we possess── 'The Tatami Galaxy' by Tomihiko Morimi. This is a coming-of-age story depicting four parallel worlds, based on the premise of "What if I had chosen a different club back then?". (AI Summary) Despite tackling a weighty theme like parallel worlds, the content isn't difficult, and yet it possesses a humor in the protagonist's word choices that will make you laugh. It's 400 pages long, but because it's interesting, you might find yourself reading it surprisingly smoothly. It might be recommended for people who haven't read many novels, or for children's morning reading. If you want to grasp the content casually, it has also been adapted into an anime, so watching that is also a good option. This was the book that first taught me what a fun reading experience is.