Aishuu
Puchitto Hajiketa
http://www.mangago.me/read-manga/puchitto_hajiketa/
http://www.mangago.me/read-manga/priceless_honey/ (chapter 2)
http://www.mangago.me/read-manga/honoo_no_suna/ (chapter 3)
http://www.mangago.me/read-manga/koakuma_no_sanctuary/ (first story)
any yaoi where the past lover comes back trying to get back their partner after hurting them