As much as I want to leave good reviews, particularly for new games, this time, it's a bit tricky... So I won't leave a bad review (but neither a forced good one though

) instead, here's some pointers at what, in my very own opinion, the problems are :
Your narrative is heavily focused on advancing the plot and laying out the environment (mainly "girls looks hot, ahouga")... I get it, it's the first chapter, so exposure and all, but it's a bit clanky, sometimes it works (special mention to MC "starring" at his m... "father's best friend" tits) sometimes not really ("Class is starting", "that's our teacher Noelle", yeah, laying on it a bit thick there ; "Alright class, let's begin !", "Our literature teacher, Noelle", "She’s ponctual, as always, and just as sexy." yeah, not that much thinner here, but you got the idea)
MC feels like it's his first day at school, there is no "belonging" feeling (an exemple when he ask his "daughter's father's best friend" Anya "Are you always this hasty" => well, he should already knows ! it's quite minors, but details like these help narrative and immersion. Same when MC "learn" about his grades... He's the one that took his exam, he knows very well how bad it is xD)
MC is WAY TOO MUCH a horny monkey, I get it, the other players get it, even my neighbors get it, the girls looks good. Say it a bit and it's fine, but if it' the only thing MC can tell while drooling, it get old pretty fast. Damn, the only thing he's got to say about Mia is "god, she's stacked" poor girl don't seems to have anything more for her, huh ? => can be more subtle like "We didn't speak that often since the school year began, but she has this sweet girls next door vibe... And, yeah, she's hot, that helps too."
The "failure at school" narrative, while made for humor purpose, it doesn't really work the way it's staged. Putting aside realism here, it just makes MC looks dumb, not sure that's what you want in a self-insert narrative though x) (and don't go on the "character development" excuse, you can develop character without starting straight out the dumpster xD) => you might want to find a valid reason that's external to MC for these grades. This is further amplified with the emotional inconsistency of the MC, one second he is carefree & horny, th other he's all "I should really better myself and be serious and whatnot". I get that you have to set tone for different situation, but it would help to have a consistent minded character
"is there a girl that like me here" => Anya spend a big chunk of her time dragging him along, Crystal has the "fuck me eyes" for him, as he tell it himself (which is a bit contradictory, isn't it ?) and Grace... You get the point, We knew it was bound to be false, yes, it's a common trope, but it's wayyy too false, too fast at this point ^^
Speaking of Grace, let set aside the elephant in the room with how cliché and how impossible it is for every men existing in this school to 1- not find her atractive 2- call her ugly (bonus : would the goth girl care that much/openly ?) and let's dive into how fast she went "how you find me pretty, hey, look, that's my cute and sexy pink panty while i'm spreading my leg in class", shall we ? Kidding, it's just too fast, nothing much to say, unfortunately... If you want to give a sort of cohesive story, you want to match the build up (or not, you can make a fuckfest, you'll just have to set for something, that's all ^^) [and the same apply to Daria]
At this point, I closed the game, a shame, you make effort for UX, you even shown the characters in a gallery, the setup is nice with a struggle that is rarely exploited fully in AVN (struggle with marks in school) and the models, albeit a bit "generics" are pretty too. I will wait for a few updates and give your game a chance again, I hope you the best of luck, have fun with your project ! =)