Starting with Demon Slayer: My Fiancée Is Nezuko!

A native of the Demon Slayer world, Di Wutian sets out with a marriage contract in hand to find Nezuko, only to accidentally activate the Myriad Worlds sign-in System:

Congratulations, Host, you have successfully signed in in front of Tanjiro's house! You have received the World King Fist technique from the Dragon Ball world! For your first sign-in, you also receive an additional reward: the Eight Extremes Collapse technique, used by Xiaoyan from the Bean Paste world!

Congratulations, Host, you have successfully signed in in the snow! You have received Feng Baobao's Eighteen Awei Forms from the Under One Person world!

Congratulations, Host, you have successfully signed in at the Buddhist temple! You have received Ichigo Kurosaki's Getsuga Tensho from the Bleach world!

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.