It wasn't often that Éponine had a chance to go to parties. Especially not ones with people she actually vaguely knew, and who wouldn't mind if she brought by her boyfriend too.
Michiru had given her a hand with her outfit, considering nothing she owned was really party material. Maybe, just maybe, being friends with insane rich people was going to work out okay...
And maybe this party would work out okay too. You never knew what things like this could bring! At very least, she had every intention of taking advantage of the copious amounts of alcohol...