This is very much bleh.
Let's ignore for a moment the completely moronic protagonist.
Leaving to study abroad ? Really? At chapter 30? This fucking SUCKS. I could sort of understand something like this at chapter 100, or 150. But this shitty development is so bad, I'm dropping this shit.
As someone else already said, this really feels like a forced plot development so that the other girls can get a chance.
Which basically means, the author paced the story so BADLY that he had no other recourse than to send the main girl away. Because else she would "win" immediately
Unfollowed.