The Principle of a Philosopher by Eternal Fool
Isekai de Skill wo Kaitai shitara Cheat na Yome ga Zoushoku Shimashita: Gainen Kousa no Structure
a high school trip bus is teleported to another world to be heroes. Unlike the rest, MC refused to help and choose to go his own. Later a spirit/ghost ask him to buy a particular slave to help and save her. LOTS of ecchi (especially the slave tract part) The story isn’t special but it has nice moment. Not a bad read but don’t expect much either.
Isekai Ni Tobasareta Ossan Wa Doko E Iku?
Ossan died and woke up in new world. When he came to, a puppy was drowning in front of him and saved it. Thanks to "lesser divine protection" he will now live in this new world, starting in a countryside town. He sometimes go to the church to talk to the goddess of this world. So far it was people in distress (no harem yet) and a old cliché heroic guy that don't think before acting, and that I can't relate to... It's not bad either but... I wish he was more... logical?
The Wrong Way to use Healing Magic
Arifureta Shokugyou de Sekai Saikyou