Murder Hobo: When the Munchkins go wild...

Isekai Munchkin is pretty much a full on Dungeons & Dragons Campaign Manga... except the Hero is isekaied with a Goddess's Game Manual allowing him to play the system...

It contains entertaining moments such as: 

When he manipulates the Paladin into changing her God to get her more combat power... by suggesting she convert to Fallen Paladin of a Very evil goddess only for her to settle for a God of the Forge. And then into a Fighter Class.

Or in order to get more cash he saws the horn off her 'sleeped' Unicorn-Warhorse and sells it for 500gp to an Evil Merchant/Assassin employing a healing potion on the Paladin's mount so he can regrow the horn to sell again next time.

Yep... he quickly backslides toward Evil Alignment by being himself.

There are Black Dragons, Goblins, Ogres, Trolls, Duergar, Paladins, Thieves, Assassins, Rangers, Druids, and your totally out of control D&D power gamer.