I Saved Too Many Girls and Caused the Apocalypse: Volume 3 by Namekojirushi

Rekka has just finished another adventure and saved a new series of heroines. But when he gets back home, he finds a new girl who demands that he run away and marry her! When a disaster involving Harissa makes him realize how dangerous it is to be around him, he runs away with the new girl, Hibiki Banjo, leaving the other heroines behind. But how can Rekka fight when he's cut off from all the girls he's worked so hard to save?