I just read the first chapter and I have to say, wow, the characters in the manga are giving off such a bad vibe. So the main character works hard at something and the girl calls him weird?! How about her working hard to become a tennis pro, are you weird too? And how come people keeps saying he's weird, one person even says he gives her the creeps! That pisses me off to no end.
Also, the manga keeps saying he thinks like an older person (I guess precocious is the right word to describe him), with that way of thinking, he shouldn't be such a pushover, especially if it's being done by a girl the same age that he barely knows and has just recently met. Telling him that he should do the stuff he enjoys and all that. You just met him and barely know him, why do you say that kind of stuff! Such a busybody know-it-all. With the way he is, he should be more confident in the things he's doing and thinking, and shouldn't be so easily swayed by words from a person that barely knows him.
He clearly has a defined goal for the future and works really hard for it. With the effort he has put in it, he should be feeling more strongly for that goal, but he doesn't! And is easily hesitant and so unsure and wishy-washy about his goals and future. Arrggh! It doesn't make sense! There's one line that clinches this for me, "Does Takasaki-san go through that on a daily basis?" OMG, you work just as hard or harder than her everyday too! Why are you thinking these stupid thoughts and comparing her to yourself and her dreams to your dreams? Why does it sound like he puts in no effort to anything!? Arghhh.
Lastly, the main character is so off for some reason, it's like he's not really thinking like a guy, especially with his background of thinking for the future, being precocious and doing great in school. With all of that, he should have a bigger head and have more ego and pride, but he doesn't?! Why? Speaking from a guy's perspective, I don't get him at all.
PS. He definitely has no "guts" and definitely didn't get an A in PE. You have no stamina, so you run away. That's it. That's the way you should do it. smacks him on the face
PPS. His motivation for getting into tennis sucks and is one of the weakest points in the plot.