any straight male yandere recs? Toxic/red flag is fine
This is trash but exactly what you're looking for, toxic and a red flag: https://www.mangago.zone/read-manga/the_bondservant/
https://www.mangago.zone/read-manga/how_to_survive_as_a_maid_in_a_horror_game/
https://www.mangago.zone/read-manga/dear_villainous_husband_the_one_to_be_obsessed_with_is_over_there/
shiki person below blocked me so I can't respond. They deleted their original post where people(including me) pointed out they were wrong and just reposted the exact same thing. Anyways, his cursing is normal for a teenage boy growing up in a bad environment.