This story is about Muzan x Tanjiro and Muzan is a alpha and Tanjiro is a omega Tanjiro Age 18 Muzan age 20 or most likely 10,000 years old

Demon Slayer AU. Tanjiro is a very sweet, kind, (dense) boy. His kindness reaches no end and he will always help anyone in need. He works very hard as a Demon Slayer and has caught the attention and love of the eight Hashiras.