since we're talking about how dense shizuma is, they will show what happened with his relationship with yuka(?) in the later chapters. and yeah, i dont blame ex-gf for feeling lonely in a relationship where you should be able to feel loved. dont get me wrong i dont like cheaters at all, but if the other side doesnt learn nor take the time to understand their significant other or or try to solve their misunderstandings and its just a repeat of the same problem, then thats a lost cause for me. it doesnt matter how many times shizuma asks minato to give him a chance to understand his mind if hes just going to disregard and repeat the same bullshit all over. the other party is bound to get exhausted bro. relationships are not a battle of attrition dude, you have to understand and adapt for every problem so you don't repeat the same mistakes.