A D-rank adventurer expelled from his party got drunk in desperation and became a hero overnight ~ it's too late to regret it (for me). That said, I'm going to beat the hell out of the holy knight who cuckolded my girlfriend ~

Axe, a D-rank adventurer belonging to the A-rank party "Immortal Squad," one day has his girlfriend Curie stolen from him and is expelled from the party. While drinking in frustration and complaining about the party to a friend, Axe drinks high-alcohol liquor and suddenly rushes out of the tavern. Two days later, Axe has no memory of an entire day. When he asks his friend what happened, it seems that during that time, he had somehow become a hero――!?