Surpass Yourself from Demon Slayer

Story of: Surpass Yourself from Demon Slayer

[No system + multiple heroines + all the worlds] There is no cheat code for traveling through time, only a body that has changed a little due to traveling through time. No matter how badly injured you are or how mentally exhausted you are, you can recover as before after a good sleep. The first world: Demon Slayer has ended. The second world: Naruto, is in progress.