Joonyoung, burdened by his extremely hideous appearance, thought his luck couldn't get worse until he was tricked into signing a devilish contract with a manipulative succubus. To save his life and fulfill his obligations, he must successfully seduce women, a task that seems utterly impossible for someone in his position. This dark arrangement forces him onto a perilous path he never imagined.

Luckily (or perhaps unluckily), the contract grants him one unique, game-changing power: complete invisibility. With the 'Skill of Being Unseen' at his disposal, Joonyoung gains access to unseen opportunities, allowing him to observe and manipulate his targets in ways he couldn't before. He starts navigating a complex, highly charged world where moral boundaries blur and explicit situations arise frequently.

However, the succubus s game is far more dangerous than just simple seduction. Joonyoung must constantly battle his own conscience, evade detection, and try to find a loophole in the supernatural agreement before the succubus claims his soul entirely. Can he master his new skill and outsmart the forces that control him, or will his invisibility only lead him deeper into trouble?

/ Alternatives: The Skill of Unseen Power; Invisible Contract