Sabosan Modern AU in which Luffy hosts a party in his house because Ace and Sabo are both out for the night and he thinks it's a great opportunity to turn it into fun (because he hates having the place to himself. It's boring and lonely). It's just the usual six people (East Blue crew + Vivi) but they always have so much fun anyway. So the thing is- They're drunk. Wasted. And they don't even get in trouble anyway, they're just playing silly games in the safety of their home and there's nothing wrong with that, surprisingly. It's impressive how they manage to get in more trouble when they're sober. However, Sanji is going through a rough time. He's been quiet all night and everyone knows something's wrong with him because he has been in a mood for the past week, but he's Sanji, so, he won't talk. Something something, Zoro and Sanji fight like usual but this time Sanji is drunk and honest and everything hurts, so he ends up genuinely feeling like shit and going upstairs to ignore everyone because he can't handle all of that right now. Nobody follows him because again, they're all drunk and they don't even know what to do with that and it'd be surprising if they even noticed the fight because, again, drunk and playing games. And since Sanji has always been and always will be in a romantic teenage coming-of-age movie ever since WCI happened, Sabo just casually, randomly, comes back home because of inexplicable reasons (the reason being he fought with Koala in their college dorm for setting on fire one of their books while saying the educational system is a scam and she kicked him out for the night). So the guy sees all this party they have and just goes "I'm too tired for this. Just don't break anything and God, please, don't go into Ace's room" / Usopp: Wait, why? / Sabo: You don't wanna know.

So Sabo goes upstairs to his room, hoping to get some sleep or work done (work being planning his next riot, not studying. Imagine Sabo studying, pffft) but instead, he finds a blond sitting on his bedroom floor on the verge of a panic attack, drunk, crying and begging Sabo not to kick him out because he doesn't want to go back home. Sabo has no idea why the hell he's saying that because he doesn't want to kick them out, especially Sanji, now that he's saying all of these incoherent things about being afraid to go back home. Sabo recognizes what's going on because he has gone through this himself and they also have to deal with Ace's panic attacks a lot. So he helps Sanji calm down and ends up reassuring him that no, he's not going back home tonight. He can stay all he wants. And Sanji keeps crying and whispering things and names Sabo only knows because of magazines and the news ("Vinsmoke Ichiji, next in line to preside the executive table at Germa Enterprises!" / "Commonly known as a heartbreaker, Vinsmoke Niji was recently seen on a date with one of Charlotte Linlin's daughters!" / "Accused of problematic commentaries, Vinsmoke Yonji addresses the discourse by saying, and I quote 'Who the fuck cares?'"). So, alright, Sabo is not fond of the Vinsmoke family and at first he wasn't fond of Sanji either for the same reason, but he's different from them and he has known ever since two years ago the guy came over with lots, and lots of food only because Luffy wasn't eating properly. But Sabo now knows the rich family isn't just full of shit socially but also inside, and seeing Sanji so anxious and weak about it makes his blood boil. Now is not the time to get angry, though, so he just stays by his side and waits for him to calm down, offering him a shoulder to cry on. The guy is drunk and having the breakdown of his life and the only thing Sabo can do right now is be there for him, even if he wishes he could just go over to their ridiculously huge house and burn it down. The things Sanji talks about aren't pretty. They make him want to throw up.

Sanji ends up falling asleep and Sabo takes him to his bed so he doesn't sleep, well, on the floor. Sabo goes downstairs instead. Besides, he has to clean up the mess the others made anyway.

So Sanji wakes up in a random bed, recognizing the room, and wanting to die from the hangover he's having right now. But he remembers everything, sadly, and he wants to die from embarrassment because he just vented to his friend's brother like it's nothing. They get along, but not that much to do shit like this. He wants to try and sneak out of their house before anybody notices, but of course, Sabo does. It seems the guy has a power for these things. But Sabo is extremely nice, actually, and it isn't that awkward in the end. They're alone because the others got up earlier to go home and Luffy went with them too to spend the rest of the day with Zoro (wow, who could've guessed). Sanji doesn't want to go home but he needs to get the fuck out of here because he feels like he's intruding, especially since Sabo has made breakfast (normal, regular breakfast. Nothing too special but it's way more than what he expected from these siblings). He has to finish eating and then he'll go home! But then Sabo offers him a shower and- Okay. He'll go home after having breakfast and showering! But then Sabo tells him to, please, stay, and be my guest, it's a bit boring here on my own and I want an excuse not to study. And how can Sanji say no to the guy who has helped him so much? So he stays. And one thing leads to another and it's already nighttime because they actually have a lot of things in common and they have fun together- But Sanji needs to go home. Now. Because if the news finds out about him being away for this long it's gonna be a problem and his brothers will be twice as annoying.

Sabo finally lets him go but- But there's something in his eyes when he does. He's worried sick. He's so concerned for him that it's aching inside of Sanji's heart too. Sanji wants to stay the same way Sabo wants him to not go. Almost begs him to. But he can't. But Sanji knows, then, that if he ever needs somebody to talk to, Sabo isn't that far from home anyway.