I do not own the book It Ends/Starts With Us, all credits go to Collen Hoover This is who I think who fits the characters very well

Miya Atsumu was a coven witch. Not only was he a coven witch he was one who was gifted the ability to carry children. This coven, couvent énigmatique was extremely toxic and one day, when Atsumu was 6 the coven discovered he had to siphon to gain power unlike his brother who already had energy stored in him. His brother hated the coven and one day, he got in a fight with Atsumu, and he left. Life became hard in Highschool and a way to cope he would drink. And one day, he decided to end it all. However a certain black hair boy reminded him that his life might be useless to him but someone would need it. Also on a03 by the user OliveLynette. Check out my yt, @/Ukasooma A SakuAtsu story which turned into a multiple dynamic series:) Started ; 6/21/23 Ended : 12/16/23 ( hiatus { kinda } )