The Dragon Breathing Demon

Y/n L/n, a half-human, and Half-demon boy broke away from Muzan Kibutsuji's cells and got away safely. The boy didn't know what to do when he got away but met a mysterious lady who took him and taught him Total Concentration Breathing: Constant and gave him his specialized Nichirin sword. Y/n saw the lady as a mother figure for him until she let him travel by himself, but not before promising they'll see each other again. Y/n travel all around, figuring things out about himself like how he can't get hurt by the sun, collecting souvenirs, and making his breathing style. Eventually, Y/n meets the Kamado family and spent time with them, until one day, while bringing coal to the Kamado House, he heard his Friend Tanako Kamado scream in the forest. This is how both of them became demon slayers while sharing things about themselves.

This is from my book trailer. Decided to change it.