Overview
Medaka Kuroiwa Is Impervious To My Charms is a high-school romance series that revolves around the main character, Mona Kawai, who is a beautiful, sexy, and cute, charming girl that attracts people. However, as soon as she shifted and stepped in the high-school world, she charmed everybody except one.
STORY
Mona is a beauty in their school, whereas many people adore her for that. I guess Mona is ~~
Kawai~~. Of course, she had already often heard people compliment her before, so she thought that charming people would be easier as is. As such, she succeeds in charming people except one guy.

The guy in the question, Medaka Kuroiwa, is a fellow student who also shifted schools to take up a challenge, that is having serious commitment to strengthen himself when it comes to his belief as a monk, one of which is to
clear his spirits when
Mona Kawai is tempting him.
Mona finds it strange that every time she tries to charm Medaka, he always looks negatively to her, which gets them to misunderstandings. However, despite this resistance, Mona doesn't stop, and Medaka isn't immune at all, and in fact, he is in denial of his feelings, often thinking positively about Mona.
After a couple episodes, certain rivals show up to "charm" Medaka after he "charmed" them, thus repeating its cycle over-and-over until someone wins Medaka's heart.

I find the story very lackluster, it is predictable who Medaka will end up with, but the story keeps on pushing towards the strafe of romance rivalry, which is truly unnecessary, but adds to the essence of fanservice. However, I adore that as the story progresses, we slowly acknowledge the development of each characters.

CHARACTERS
The main characters of the story (along with Mona's rivals) are given the focus, which is a good thing considering the distinct characteristics that further contextualize the storyline, but certain characters- including the significant supporting ones- have unrealized potential left wasted. There could've been more opportunities for the other characters provided towards a hint of futuristic romance but fails to do so.
I do see the potential detail when it comes to the other characters, such as Tomo, who could've become Mona's rival (~~and should be~~). However, I think that the story pushing more characters towards Medaka or keeping other characters down for the sake of main is solely unnecessary and waste of time.

Though, character designs surely are creative and engaging. Each characters are detailed into their characteristics and designs.
VISUALS
I have come to the terms that there is this feeling that the anime adaptation visuals is odd. While I have read the manga before, the atmosphere is different. Don't get me wrong, the anime version is purely enhancing the details from the manga, but there is something wrong with the visuals I comprehend. While this is not a general opinion, but something about this series' visuals put me off.
OVERALL
If you had a beautiful or handsome schoolmate, you now know how you feel that they charmed you, and how they feel that they have charmed others. Truly, these kind of people who are given the blessing like Mona's, are purely tempting, which is why many people around them might adore or even have crushes to them. BUT if you're given the blessing like Medaka, consider yourself lucky.
The series is mediocre, but gives us really good fanservice that further engage its audience. ~~If you have read the manga, you know what I'm talking about.~~ The anime adaptation feels different when compared to the manga, but it still executes it properly which is a good thing. The story will keep on repeating until someone manages to charm Medaka's heart, but there's that, most of us know who's taking the prize.
Sadly, Medaka Kuroiwa was truly Impervious To My Charms because his anime adaptation ~~didn't charm me that bad~~ is executed. ;P