Y U Mad, Anna ? You're the one who wanted to focus more on your career than your relationship, so, don't be surprised if your man actually ends up spending more time with others than you !!
I'm shocked more people aren't saying this
I don't like the idea that Kyotaro is the only one who is wrong and has to apologise, but trying to portray Anna in this way is not a better position. It seems obvious that both have communication problems, where neither of them communicates properly in an attempt to support each other. Kyotaro constantly hides his emotions and tries to support Anna, sometimes going to extremes to protect her career, despite how she feels, and tries to push himself too far to become ‘worthy’ of being Yamada's boyfriend.
When Yamada herself, instead of honestly expressing what she feels, simply begins to restrain herself and bottle things up in order to keep up appearances, forcing herself to do things she is not capable of, both in her relationships and, most likely, at work, because of her desire to be “grown up.”
Both made a mistake because they simply didn't communicate properly and did not understand each other's feelings, and they both need to finally try to express their feelings (even if it may seem unpleasant for the other person). Forcing only one of them to apologize won't fix the problem and will only continue the cycle, causing the problem to reappear and leaving them with no relationship at all.