
But if they DID leave the sister alone,
What if the owner of the restaurant/bar was a beautiful mature woman that noticed her and fed her water and stayed by her side until she was sober?
They'd both sit on the bench during that time, and talk a little.
The girl would complain about her big brother and how even that beautiful man was as much a wolf as her bro~
They'd talk about each other's family members then, naturally, the restaurant owner has a tragic past, and the girl is just overwhelmed with compassion and gazes at the gorgeous woman's profile with admiration and affection.
She'd blurt out, "I'll be your family." The woman would look at her all surprised, but a warmth of infatuation would take over her stomach, and she'd smile and kiss the girl's temple.
There would be a comedic moment like, the owner suddenly forcing water in the girl's mouth while saying "you're still not sober?!"
And the girl would swear she is, and, still with the comedy tone, do stuff to prove she's sober
But then she'll really prove she's sober and good at math, and she'd go home with a cab.
The morning after she'd remember it all though, and then try to spend a lot of time with the restaurant owner because she really feels like the two of them could be 'family' in some way.
Obviously you dont have sex with family, but a family by law, that's different...
So yeah, it would end with kisses and "I do's."

The way I see it, the sex scene was real, and when we went back to the restaurant, we could see him say "I love you"
Which, if you paid attention, he said earlier, but the uke was like 'huh? Did he say something?' And now we know what he said
In other words, it wasn't a 'return to reality' but a 'flashback to uncover blurred words'
But then again, if it was a dream, at least we know the sister was safe
Its a five star for me, but if the endgame is psyche and helio, it'll probably end up being a 4 stars/ maybe even three