If you're looking for a romance manga where the lead characters have actually good character development at a very good pace, then this is the right manga for you. Story and characters stand out from other similar series in this genre, because the author has done the character and story progression in a very decent way. There's no beating around the bush, or hundreds of chapters of misunderstandings between the main characters, or anything like that. Every character has a very good personality to them and it outshines at the right time as well, they're wholesome, cute and enjoyable. The characters never felt annoying or cringeto me (which is a common occurrence in this genre).
The ML and FL also have a very wholesome relationship from the start. Their relationship also progresses at a very good pace and feels very natural. High school setting is also executed very well.
Overall, I'd highly recommend this if you're looking for a wholesome high school romance which has a good pace and no pointless drama. Definitely give it a try!