Lin Cheng traveled to the world of Demon Slayer.

Although he got the golden finger at the beginning and unlocked the template of "the strongest creature on earth" Hanma Yujiro.

But before he became truly invincible, Lin Cheng wanted to survive until he became invincible, even if Demon Slayer might have ended by then.

However, the variables changed when Lin Cheng went on a blind date with a girl named Kanroji Mitsuri...