Oretachi no Party wa Machigatteiru

Oretachi no Party wa Machigatteiru (オレ達のパーティーは間違っている, lit. "Our Party Is Wrong") is a manga series by Enushi. It was seriLied in Ura Sunday.

Plot
A party of 4 heroes defeated the Demon King, however with his last bit of power he separates and gives each of them an unusual curse to make them suffer for the rest of their lives.