Responses
black dog is a yandere bl story
https://www.mangago.me/read-manga/kuroi_inu/
idk this more psychological then a bl but its kinda childhood friends? theyve known each other since they were kids
https://www.mangago.me/read-manga/i_want_to_be_killed_by_your_beautiful_self/

Do you guys have any recommendation about childhood bestfriend to lovers but it's red flag and kind of psychological bl?