I'm very much interested where the author tries to take the character of Kuroda's girlfriend, she seems like a person who wants to stop Kuroda from pursuing his ambitions, and I can't say I don't see why, especially when the man has a secure job, healthy social life and what not you'd expect from a perfect partner, she isn't evil, she's just scared of losing the life she has, she doesn't want to end up in an unstable lifestyle, from her point of view, her boyfriend is in dump, and he has suddenly started writing and now thinking about quitting a very stable job to go after a profession which sprung out of nowhere to him, it's natural reaction acted in a wrong way.