
I think Kan was the person that kept Yumi from thinking of Maya. That's how their relationship went on. Not because of mutual love. Yumi may like Kan but not as much as how he likes Maya. Kan may low-key knew all of this also. He became emotionally unstable due to his work and knowing the truth about his relationship makes it worst. He needed help but his mental state wasn't really taken into consideration. He was just a violent person although we all know he just went like that because how toxic his work is. If only love could make our mental state stable while working in a toxic environment. How great would that be!! Yumi and Kan used each other just different approach that's why it's a toxic relationship. Violence is not the only thing that makes the relationship toxic sometimes when the other person doesn't really want to be with you as well. If Kan never got that toxic job and Yumi and Maya meets again. Yumi would only keep the relationship going because of guilt or leave Kan for Maya.
I don't understand the Uke. Why did he let Alex do those things and wonder why the seme is jealous?? The uke needs therapy.