Demon Slayer: While I Was Lying Flat, Brother Juehu Listened to My Thoughts

Travel through Demon Slayer: Kimetsu no Yaiba and become Ubuyashiki Yōya's retainer. Awakening the lying down system, you can get rewards as long as you persist! It starts with a bastard Zanpakutō. Who would have thought that there was something wrong with Ubuya Shiki Yaoya, and he could actually eavesdrop on his thoughts. "The Demon Slayer Squad can definitely kill Muzan." Stop making trouble, brother Zetsu, the entire demon slayer will be wiped out by the gang! "Enzhu is definitely the strongest in the Demon Slayer Squad." "This senior is also my idol!" Good guy, you've only appeared in chapter 100 and you're just a fool, I'm so stupid! Ubuyashiki Yoshiya: This time in this millennium, you will definitely pay the price for being miserable. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.