[Almost in retaliation for being held down, Jiro's bundle of tails start to whip even faster thanks to Momo's invitation, and she can't hide the way a smile picks up on her face as well.
She ends up giving Momo a curt nod as she walks past her into her room, letting go of her tails once she's inside... holding onto them clearly isn't helping, after all.]

Mmm, you seem like you're having a hard time... But it's 'cause of your moon cycle, right?

[The look she gives her is a soft, apologetic little smile, clearly not trying to call her out with that - but doing it anyway, of course.
Because it's Jiro, she's gonna call people out when they need it.]

Are you... having a hard time with something? Midoriya put together some notes on the cycles, so I've been trying to memorize them, and since he's Iris it's pretty detailed; so if you need help, you know...

[What are best friends for if not helping, right?]