On chapter two we are momentarily shown the fountain pen (before we even get the explanation of how he obtained it) and right after we witness him gazing at mc. This is a very clear indication that he sees her as an object he wants to own. Watch him crash her enemies and loved ones (that don't return her affection apparently) equally, just for the sake of making her his possession. As i predict it, he won't even give a fuck about her career, if anything he'll find her aimless state preferable, since he'll be able to completely control her. I wouldn't call him a yandere, just a full blown psychopath, a collector.