Demon Slayer: I Have Byakugan-

An ancestor has been a watermelon seller for eighteen generations. The melon seller Yubai died in the original world and accidentally traveled to the popular Demon Slayer world. In this new world, he became an orphan. He was adopted by the butterfly ninja's sister Hanashira in the butterfly house and carefully taught breathing techniques. But as a time traveler, Youbai does not have the incredible talent that he imagined, and his qualifications are mediocre. Zhanguishi: "If you don't even have the ability to protect yourself, how can you protect the people you want to protect?" Youbai: "This time, let me protect you!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.