【Comprehensive Anime】+【Multiple Heroines】+【Death Shura Field】+【Chasing Husband Crematorium】

"Will you choose her or me? I am your first sister!" - Kasugano Sora

"Chi, you are Mashiro's owner." - Shiina Mashiro

"I am your only choice!" - Yuki Suho

Contains the heroine of the work:

Mygo, Boring Girlfriend, Lonely Rock, Sakurasou, Ellie, the neighbor who whispers the truth in Russian from time to time, Sora no Sora, Oregairu, The Quintessential Quintuplets, Rascal Head, Girls Band Cry (GBC), etc.

The librarian, who was the champion of the World Swordsmanship Championship, traveled to the world of Demon Slayer during the Warring States Period, awakened the Great Swordsman System, and became a disciple of the Jigoku brothers.

From then on, he created various legends of his own in this world!

Muzan Kibutsuji: Facing Yoriichi, I can still escape, facing the librarian, I have no choice but to die! Yoriichi Tsugikuni: Your strength has surpassed mine! Demon Slayer Corps: The librarian is the most powerful man!