Traveling Through the World of Demon Slayer with the Zanpakutō

I fell asleep watching the Bleach and Demon Slayer anime at the same time. After waking up, I found that I had traveled to the world of Demon Slayer: Kimetsu no Yaiba. The kind that can use a Zanpakutō. He also became the adopted son of the Ubuyashiki family. I was promised a twin sister from the Ubuyashiki family as my fiancée! I thought I could reach the pinnacle of life, Unexpectedly, he was sent by his adoptive father to participate in the final selection of the Demon Slayer Team. I still want to paddle behind Kamado Tanjiro, Who knew that Tanjiro Kamado would suddenly receive a bento? I'm just a little panicked right now... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.