New thread new rec! After his parents were brutally murdered Ellis is raised by his adoptive father in a quiet seaside town. One day he catches the attention of a mysterious stranger (yep, vampire). This comic's not a slow burn per say, but the updates are coming out ~once a month so your mileage may vary. Cute boys and the supernatural aspect is just starting to really kick-off.

https://www.webtoons.com/en/canvas/blood-for-the-bleeding-bl-/list?title_no=686463