u/Debironakajan

I am searching a obscure webnovel that I found on this sub.

I think it was one of those where the entire class is reincarnated and the mc gets thrown out. However he doesn't leave alone, he travels with a female classmate.

From what I remember they travel along a river and become a couple pretty quickly. They also actually sleep with each other.

At some point they reach a town where a second girl is introduced I think.

I believe it went into a harem direction, however I only read to that point.