I opened the treasure chest in Demon Slayer: Kimetsu no Yaiba

Story of: I opened the treasure chest in Demon Slayer: Kimetsu no Yaiba

Ryuichi Haneda, who traveled to the world of Demon Slayer: Kimetsu no Yaiba, obtained a treasure box system, which allows him to extract various super items and powerful skills, top breathing techniques, the Zanpakutō in Bleach, the Haki in One Piece, and the Zhizhi in the Shaoyue world. Deathly evil eye!

He is the most powerful trainer in the world, and he is also the most powerful ghost-slaying swordsman in the world.

Kibutsuji Muzan's face turned pale: "Hada Ryuichi, can you please stop killing me?"