Yup, that sure is a bunch of calculus. "Can you teach me this stuff? My classes haven't gotten to it yet." 'Bright-eyed and curious and wanting to learn things' is just about the easiest affect to do.

"- Oh. Uh. Sure. So have you learned quadratic equations yet in your classes...?" 

"I can graph them and factor them but can't find the zeros if they don't factor."

Rebecca approaches - carefully, she's been hanging out with New York but people probably can tell she's not actually one of theirs - and waits to be acknowledged.

Vanya has all of his calculus notes spread out on the floor and is deeply absorbed in figuring out how to explain it to Marcy. The hard part of this is mostly figuring out how to not be incredibly distracted by feeling awful constantly. 

He is super not going to succeed at noticing anyone quietly hanging out nearby waiting for acknowledgement. 

Checking the perimeter for mals also works for spotting classmates. Who is--oh no, it's pajamas girl. Marcy has been carefully avoiding the mundaneborns because they're almost certainly doomed and she doesn't want the temptation to spend resources she can't afford on trying to fix that. Marcy looks back at the calculus for several seconds and then back up.

Pajamas girl hasn't gone away and appears to want to interact with her and/or Vanya in particular. Well, at least Marcy can find out her actual name, it's not like she's still wearing pajamas.

"Yes?" she asks a bit tersely.

"Hi, sorry if this is a bad time, um, somebody told me his affinity was music? And mine is too? And I wanted to - maybe talk about music? But maybe you are busy with math and we can just - meet later, I've been eating with New York?"

Vanya sets down his notes and pen. 

"....Your affinity is music too? What songs do you know?" 

"Oh, that makes sense, have fun," by which she means, oh, gatekeeping you is Vanya's job and he has done it, great. She keeps working on the math because she doesn't know anything about music.

"Probably too many, I'm going to have to learn Latin! But spellwise, uh, I have a lullaby that always worked on my baby sister and I miiiight have turned a bit of Hamilton into something that killed a little mal one time and I have a book of Latin song spells I got from the void and I don't know how to tell if the ward one works well...?"

"I speak Latin," says Marcy, not looking up.

Vanya is looking actually kind of engaged again! 

"- I can probably help you figure out the ward? I know Latin too. Did you sing church music when you were little? Church music is actually really good for spellwriting inspiration even though Jesus doesn't exist and if there's a God he probably wants us all to die horribly." Vanya says this very conversationally. "Anyway, sorry - what's Hamilton?" 

Vanya has a good set of languages and good theological opinions and is good at explaining math and this makes doing his homework much nicer than it would have been otherwise.

"Hamilton is a musical about the Founding Fathers!" says Rebecca, who will apologize to God for not challenging him on that one later. "And yeah I know a lot of church music, I love church music. - uh I don't know how I'm going to do at Latin so please don't try to teach me any other languages besides that and English right now."

"Right, of course I'm not going to accidentally start you on other languages? ...Um, do you mean the Founding Fathers of America? I'm...really curious what a musical about that would even look like and which part of it would be good for killing mals?" 

"A lot of people die in the musical actually! Most of them from like bullet wounds so I improvised a little since I didn't like have a gun. I'm not actually sure I remember exactly how I changed it."

Vanya blinks at her for a moment. 

"...Want to sing it for me?" he says finally, shyly. 

"I do know the whole thing! But lots of it isn't for one voice."

"- Wait, you have concert song-spells? ...Sorry, as in, spells that need more than one person singing in harmony, I mean?" If so then that's SO IMPRESSIVE. 

"- I don't think most of it is magic, it's just a - show?"

"Oh! Wow. I - didn't really get to see very many shows, before...this. That's neat. Um, do you know how to write melodies down on sheet music?" 

"Yeah, my voice teacher taught me to do melodic dictation! We hadn't started on harmonic dictation yet."

The terminology isn't entirely familiar, and Vanya squints at her. "Harmonic dictation is, um, writing down chords?" 

(He does look thoroughly absorbed, and less miserable than he has at any other point in Marcy's presence.)

"Yeah! It's on the AP music theory test so I was going to get to it later on."

(It's so good that Vanya is enjoying himself! Hopefully this experience will strengthen his will. Meanwhile his homework is getting done, probably not to an A standard given how new the concepts are, but well enough and with carefully shown work so he can improve on it later if he wants. Calculus is cool.)