A girl has small boobs and is obsessed with trying to make them bigger. A boy promises her that he can make them bigger if she will date him. She makes a deal that if he manages to make them grow bigger in a month, she will become his girlfriend. He then orders multiple drugs from the darknet that are supposed to make boobs grow but the vendors troll him by making the drugs do anything but that, like making her ass bigger, making her horny, etc. By the end the drugs have turned her into a sex slave to the boy, but she still has small tits. The end.

i like the commitment to needlessly brake the female mc here,like a proper hentai should, but why not end it on a beach episode and make her tanned or something idk sounds much nicer, big tanned bimbo on the beach happy yafeelme

Yeah but the point of it is that in the end the drugs didn't fix her primary issue: small tits

in my she doesn't have big tits either, I just think you can spin the storyline in a more positive direction, I like my hentais happy these days like the hotel honeymoon plotlines or the fuck my stepmom ones