Lock, the son of an innkeeper who dreams of following in his father's footsteps, is struck by two misfortunes.

First, his beloved childhood friend and precious stepsister both fell for a hero and left the village.

Second, the moment he left the village to attend the academy, his family's inn, along with the entire village, was wiped out by war.

Having lost both potential brides and his future workplace, Lock is left in a daze, only to be dealt another blow: his expulsion from the academy is announced for one year later. Panicked that he won't be able to become an innkeeper like this, he reluctantly knocks on the adventurer's guild's door to save money. And to become an innkeeper, of all things? He begins to train his body, gasping and groaning all the while—

※The protagonist is a bit of a hapless eccentric.

※The heroine will appear from Chapter 2.

※"Zamaa" (comeuppance for antagonists) is planned for Chapter 4 and with the Insect Demon Lord, but it is not the main focus.

※Also, he doesn't immediately become a cheat character. He just occasionally goes berserk. However, the enemy Demon Lord is overwhelmingly more of a cheat.

Lastly,

To be frank, this is a rather half-hearted work that I'm writing little by little in my free time for stress relief. So, while grand adventures, exhilarating revenge plots, or "I'm so strong" moments do exist to some extent, I'd be burdened by too much expectation. Please think of it as a snack, like an occasional rice cracker. My apologies if that's not what you're looking for orz

※I'm also posting an alternative route on Kakuyomu, which consciously uses different tropes than those found on Narou (to avoid duplicate content).