haven't completed this yet but i need a separate manga for aiji and ariyaka(?), his ex. i ...

haven't completed this yet but i need a separate manga for aiji and ariyaka(?), his ex. i need to know how they met, how they started dating, who confessed first, why they broke up, their life after the breakup and how they get back tgt and stuffs...judging from what I've read so far seems to me like the girl was insecure and the aiji was being way too kind with other girls as well so she had trust issues and brokeup with him but they both still like each other very much