Demon Slayer: Saitama System at the Beginning

A teenager whose parents died in a car accident lived online all day long until his cell phone suddenly exploded while sleeping one night, and he traveled to the world of demon slayers! At the beginning, you sign into Saitama's system, practice immortality skills, the Chinese martial arts Bajiquan, Tai Chi, learn a hundred times your talent,... The day when you pretend to be cool, slap in the face, and collect the harem! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.