Responses
Is this it? http://www.mangago.me/read-manga/renai_rubi_no_tadashii_furikata/ (Chapter 3)
http://www.mangago.me/read-manga/hadakeru_kaibutsu/ (sequel)
This sound like a manga of Ogeretsu Tanaka.
Thanks everyone. That's it. I wanted to finished reading it.
Help me find this yaoi
So, the guy used to be abusive to his ex and a delinquent while in school--has piercings and red hair. He meets this guy at work and they have a fling/like a sex buddy relationship and the other guy (seme) falls in love with him and the uke falls in love with him, but he keeps punishing himself for being abusive to his ex by keeping a picture of him.
Thanks!