Yea he does there story is in this order
0. Aazami - past Yumi x Kan
1. Sabita Yoru Demo Koi Wa Sasayaku -Yumi meets Mayama and breaks up with Kan chan
2. Renai-rubi no Tadashii Furikata (ch3.1 - 3.5) - Kan meets Shuuna and turns uke
- Narrow (Place collection) - dj Kan x Shuuna smutty sidestory
3. Hadakeru Kaibutsu - continuation Kan x Shuuna
Here are the links
http://www.mangago.zone/read-manga/azami/
http://www.mangago.zone/read-manga/sabita_yoru_demo_koi_wa_sasayaku/
http://www.mangago.zone/read-manga/renai_rubi_no_tadashii_furikata/
http://www.mangago.zone/read-manga/narrow_place_collection/
http://www.mangago.zone/read-manga/hadakeru_kaibutsu/
And I’m sure somewhere Kan knew that Yumi has been in love with someone else. Especially when he is holding onto that phone all the time. Kan knew yumi was running away from his feelings. And I think Kan deserves the chance to be forgiven he knew what he was doing was had regretted it and hated his actions and himself. He was mentally, physically, and sexually abused at work. Stress from family and money problems. Being look down upon. And knowing himself he can never be his happy self again. Yumi didn’t talk about his problems because he wants to be a strong person and didn’t try to talk to Kan about his problems but just accept it and ignored it while waiting for the old Kan to smile and come back. Which hurts Kan more because he know he can’t go back to how he was. I’m not saying Kan didn’t do anything wrong domestic abuse is bad no matter how you put it but Kan should be given a second chance. He always regretted every time he hit Yumi but couldn’t stop, he even tried to leave once, he also knew the change in yumi and broke it off in order to let yumi go at the same time giving yumi a push to his happiness. If he was a mean and abusive person by nature then he wouldn’t let yumi go he would have beaten and threaten him. But he didn’t he told yumi to go so he wouldn’t hurt yumi any more. His circumstances led to his actions his bosses are jerks! If you read the prequel or all of the sequels( think there was 3) you see that he was not only physically and mentally abuse but also sexually. His boss made him strip and was about to rape him but I think he puked. In Azami you could see him calling out to his mom and yumi for help. Kan had a hard time too.