It is a whole of nonsense, because it feels like it starts without context after a whole different story has passed
But I will attemp my best to try and give order to this cesspool of a story
Some random old lady dies, and leaves a a pretty big inheritance to some random teenagers, none of the 4 kids are related to each other or to the woman that died, but they got her house and money, and now are spending it on things like expensive coffee and wathever other bullshit they can think of
The 4 kids are childhood friends and grew together, the 2 girls like the glasses bland self insert boy, he is the typical harem protagonist that doesn't has shit going for himself, but women jump at his dick anyways
The other dude is a sporty kind of guy, who goes around trying to get a girlfriend and failing, and the 2 girls think that he is a manwhore
Sporty guy's existence is kind of filler, and very confusing because it is not clear, as far as a narrative goes, why he is there other than to be a thirdwheel, and cockblock, because he is not really much of a wingman, and the focus of the story is about which of the 2 girls glasses guy will fuck, if he ever grows some balls, but anway part of the house and money is his, and that's were the plot happens, so he has to be there
Sporty guy may not be a virgin, but the other 3 are, and the only reason they are virgins is because glasses boy refuses to pull out
Eventually going for what i saw on the Spanish translations, the unemployed granddaughter of the woman that died comes back to town, she is an adult and an alcoholic, also a slut, she quite her job in Tokyo after spending all her time partying and having sex, and working was too much of a pain in the ass
There's no explanation as for why the inheritance ended with the 4 kids and not with her
She also talks about having an unknown stepbrother that her dad had from outside marriage... so there's that too random bit of lore, also no explanation why the inheritance didn't end with her dad, or with her unknwon stepbrother
Also it seems like the girl with long hair is from a yakuza family, or from a religious cult, the alcoholic then tells the kids that you don't need to date somone in order to fuck, you just need to be horny, so all that happens around chapters 7 and 8
Anyway near the end of chp 9 it is revealed that alcoholic granddaughter is a local celebrity, everyone loves her and she is super popular, with her own secret fan club in high school, and the sporty kid also used to have a crush on her too, but she is a mess, so he moved on from her and is focusing on his current gf, that will dump him as is tradition
Some random passerby old granny shows up out of nowhere and then gives them a plate of sea food and a bottle of sake, as thanks for the alcoholic granddaughter helping to mow her lawn when she was young, the random hag reveals that alcoholic granddaughter has a childhood friend that still has a crush on her because he respects her but also fears her
Then the alcoholic reveals that she used to bully her childhood friend by making him jump down cliffs, or throwing him into the sea and leaving him marooned into the rocks, but since she is hot and sociable and everyone loves her, it was ok, and the childhood friend was a bit of a beta pussy bitch anyways, the old lady ships them, but is clear that such filler relationship wont go anywhere because she is too much for him to handle (so the alcoholic may get a love triangle of her own with her stepbrother, and loser childhood friend as a side plot)
But none of that garbage matters, chapter 9 is a beach episode, prompted by the idea that you don't need to date in order to have sex, glasses boy gets an unwanted double handjob from the 2 girls, while fingering the one with long hair, except he acts the whole chapter like he is not into it, "Oh damn i am forced to have sex nooo", so the sporty boy cock-blocks the threesome by doing loud pushups on the beach, glasses boy screams at sporty boy for protecting his virginity (despite complaining the whole time), and the 2 girls end disappointed
I think glasses boy is gay and wants to fuck sporty boy, but instead ended with 2 horny bitches after his dick, while sporty boy is just trying to get some pussy that will love him back for more than a week, however he is cursed with being a known manwhore that no one can take seriously, and the alcoholic grandaughter is just here for fanservice