This manga is fucking hilarious. The kinks it’s focused on aren’t mine, and it’s not even my preferred form of yuri (it does definitely have the “created by a straight male hentai mangaka” feeling), but it’s so relentlessly funny and creative that it basically transcends all of that for me. Page 6 of chapter 4, in particular, is probably one of the single funniest things I have ever seen in a manga. Kaguhara with the “environmental scent devices” up her nose, her insanely goofy expression (her expressions in general are priceless), the earnest and detailed narrative explanation of what she’s doing, the fourth wall-breaking bit about how the equations are just there to set the mood for the panel… it’s sublime.
The MC is not very likable. She acte like any ecchi male protagonist. She gets want she wants and no one question her reasoning and let her .... snif them ? WTF
I don’t think Kaguhara’s really meant to be likeable. The narration itself basically dunks on her throughout the manga. She’s a creature of pure id, and that’s both what produces the comedy and makes her a less than ideal role model.
On her acting like an ecchi male protagonist, I pretty much agree with that and I think it’s actually pretty interesting how she’s depicted. Kaguhara herself is basically never painted as an object of sexual desire; she's never the subject of fanservice-y shots (at least not so far), and her horniness is portrayed as comedic rather than as titillating or sexy. I don’t think she’s a self-insert character per se, but I do kind of get the sense that she’s the vehicle through which Sakeru is partially indulging in and partially making fun of his own id. Why he chose to make that character a girl is a question which could have lots of different answers.