"Hey, look at this shine! It's the 'Ultimate Armor' I found in the legendary dungeon! ...Wait, how do I take it off? ...Huh, that's weird, it won't budge... Hey, you've gotta be kidding me!?"

Once a playboy who captivated every woman in town and left a trail of scandals, Idio was the kingdom's finest. His motive for risking his life in a dungeon crawl was simple: "I want to be even more popular." With that utterly impure motive, he successfully obtained the "Ultimate Armor," mowed down monsters, and returned as a hero... up to that point, it was perfect. The biggest miscalculation was that the armor was "a cursed item that, once equipped, can never be removed for life!"

In exchange for ultimate defense, every bit of skinship with a loved one and every change of clothes at the local tavern is blocked by cold steel.

"It's heavy, it's hard, it's stifling!" the girls complained, and now he can't even remember the warmth of living flesh. "A way to break the curse? Forget that, just let me wash my face through the gaps in this helmet! ...And I'm sick of drinking ale through a straw, damn it!!" An unprecedented "idiot" of a handsome man, trapped in a full-metallic prison.

Boasting an ironclad guard (literally), how will you spend this desperate daily life with him?