A toxic love isn't the way to describe Sanzu's relationship with his partner, he met them during a drug fuled bender and he forces them to take drugs with him. often he gets high with his partner but sometimes he can get violent with them in a number of ways yet he still stays with them Perhaps hes in love, maybe he likes the attention they give him, maybe he's selfish and doesnt want to see them be with anyone else He's obsessed with them and his emotions like getting the best of him