A young man, Haru Tajima, found himself transported to another world while playing a social game.

Confused by a game-like world dominated by swords and magic, he aims to climb the social ladder using his modern knowledge, but... it turns out to be a nation boasting 'cheat-level' internal affairs, once ruled by a hero.

People are well-fed and wear clean clothes. The town prospers economically, with reinforced concrete houses lining the streets. His superficial knowledge proves useless, he can't find decent work and fades into obscurity. He embarks on a desperate, make-or-break strategy for survival.

"I have a very special proposition, one intended just for you. No, no, it's nothing suspicious. In my hometown, we call it a pyramid scheme, but..."

This is the otherworld success story of a man who was scorned as a swindler and later called the Soap King.