There must be an error near the end. He reacted to her statement by saying "Don't call me a pervert", but she didn't. I'm assuming she did in the source and it just wasn't translated well.
Looks like this artist has some problems with drawing clothes. Got some of the shirts clinging to the point the character looks like they're not wearing one (like the blonde with the sweater). Not sure I'm feeling the story yet, but it took me a bit to be on board with Asa Made Jugyou Chu so...
This intro makes no sense. He moved away 9 years ago, they communicated daily over SNS until he came back and transferred into her school, but they never called each other? That's just dumb...