The plot is okay, what infuriates me is the MC himself
Her crush, her sister, and the others are all okay
However the mindset of the main character is annoying, he doesn't understand that his self deprecating nature hurts others. He puts Natsukawa on a pedestal, claiming he is a fan and all of this happened because a soccer ball almost hit him which is pretty lame for a character to change like that.
The time where he is together with his sister and the council members, he makes a passing comment of he is such a loser and mentioning about her mother along with her sister something about what they told him in front of them. He isn't aware that he made her sister look bad, it's those type of people that are annoying.
That time too when Natsukawa simply said that she won't let her sister go near to someone like him. Now understand that she didn't mean it seriously, it wad like a joke but what did the MC do? He just agrees with that comment about that and walked away, does he not realize that it made Natsukawa look bad? How he justifies his actions of "knowing his place" is annoying, knowing his boundaries and etc are lousy excuses.
How he treats people is that he assumes the worst of them, make a self deprecating comment and act he is right yet he doesn't understand the effect it causes.
We are slowly seeing people like the council president and the tomboy friend of Natsukawa to enlighten our MC here but this MC is too narrow-minded and fixed with his laughable pathethic excuse of a mindset.
He reminds me of Hachiman except Hachiman is more understandable and his reasons are more believable and how he changed throughout the series is good. The problem with our MC is given too much power of his role on his story to look like he's right. Some people thinks that Natsukawa is a bitch and the other characters are bad but personally, i don't think they are bad characters.
The MC is just stupid with a stupid kind of self awareness with stupid kind of handling it and showing it to other people.