For me, based on the translated chapters so far, what's fun is the MC's monologue. In real world, MC doesn't care about anything other than playing games, and the games that he played are normal, shounen-type game, not harem/ero. So, when he entered the world, he's basically flying blind, without prior knowledge of how this game, which is akin to a visual novel, will pan out. And as a straight guy, he doesn't know how to navigate the homosexual relationship plotlines when he becomes the shou-protag. When praised for his beauty, he's like, "What was the use of good looks? Could he live for seven days?" And he didn't notice the relationship flags that popped up, it was only when the male leads became yandere and killed him, that he realised!