Fuu's Birthday Event 1

HAPPY BIRTHDAY
Chapter 1
Hero Club room
YY: Huh? Where's Fuu-senpai?
Ka: At the faculty room.
It: The rainy season is around the corner, so they asked her for flyers to remind people not to forget their umbrellas.
To: The rainy season is around the corner...
YY: What's the matter, Tougou-san?
To: This world is essentially a different dimension, correct? I wonder how the flow of time or the change of seasons works here.
To: Could it be that we're getting older while we're here? And if so, does the same go for the elementary schoolers?
So: Oh~. The small Wasshi will grow up~.
Ka: Wouldn't that mean... the elementary schoolers will become middle schoolers, and we'll turn into high schoolers...!?
Hi: Apparently, that's not the case.
Hi: The seasons do change, but it seems like our subjective time is stopped.
YY: Mhm?? What's that mean?
To: The Shinju-sama creates an impression of changing seasons, but time itself doesn't flow?
Hi: That's right. Objectively, it's May right now, but your bodies
It: Aaaah!
Ka: Wh-What is it!? Don't scream all of a sudden, you're giving me a heart attack.
It: I-I forgot. Onee-chan's birthday is in May!
YY: Oh, you're right. So much stuff happened all at once that it totally slipped my mind.
It: Wh-What day is it?
So: It's May 2nd~.
It: Aah, we missed it... Onee-chan's birthday... was yesterday.
Ka: Then that's just how it is. I'm sure she forgot it herself, too.
It: But... we celebrated it every year...
To: Cheer up, Itsuki-chan. It's not too late to celebrate it yet.
YY: That's right! Let's throw a birthday party for Fuu-senpai now that we remembered it.
So: Let's, let's~.
It: Okay...