Don't think a shoujo love interest has ever been this real. He's just so... rational, and put together and he really seems like he's mature. No matter what the age states in manga, the characters don't always look it, and he certainly doesn't, but despite whatever age they state, they often act very childish.
I really thought I was going to hate this manga and there are certainly parts and elements I do, but overall I can't.
It's annoying how many people apparently can easily tell she likes him, or it's ridiculous that anyone's friends would be like "go go" or even bring it up or even think too deeply about it.
basically in a lot of aspects this would be a basic shoujo but the guy, and not the concept, is what makes this unique.
Until the time skip, where he acts almost totally different despite two years not being that much for people around that age. He goes from having problems with it to no problems faster than light, and we don't get a glimpse of his awesome maturity but the ending is mostly just airing out everything. I think it could have been done faster with less talking.
the Diamond story is nice, cute, relatable ect. But due to the drawing style the girl already looked good, they even said she was in shape, so on and so forth. Though I'm all for someone taking care of their physical health, and I'm glad that was part of it. I also think skin care is okay to avoid damage, and maintain at least healthy looking hair(like not too many random strings popping out) is useful knowledge But it really goes way beyond that, tossing away her hairstyle and glasses, all of which were fine. I think it's just too far, even if she actually wanted some different clothing but it really didn't seem like she did. She did have a lack of confidence and maybe she didn't think those things would look good on her but it's not like she expressed a desire to be like those girls who were biyatches.
Also at first it seemed like she liked the trainer guy and then the story switches it and mostly forgets about him. All the named characters are really nice though.