Loner Life in Another World (Light Novel), Vol. 1

A really funny read, but it depends on your tolerance for manzai comedy. The MC is borderline insane, makes for an entertaining read but it can be frustrating or annoying if you're not into that kind of thing. However, the first half of volume 1 is an absolute slog to get through because it's your typical isekai stat grinding crap. Once he finally reunites with his classmates, it picks up.