http://youtu.be/PfS6BA8lhik
Skip to around 20:45

Birthday ~Yuuki Yuuna~

T: Today is the middle day of the equinoctial week.
Y: Eh?
T: I just think it's weird that we're doing club activities in a national holiday used for visiting grave.
Y: Ye, yeah... (But today's my birthday... Tougou-san, did she forget about it...?)
T: What's wrong?
Y: No-nothing! (I guess it can't be helped... Tougou-san's very busy...)

F+I+K: Happy birthday, Yuuna!
Y: Eehh!? You remember!?
F: Of course! That's why I called you here.
K: You better be thankful.
Y: So you're all here for me!?
I: Yuuna-san, congratulations This is grom me.
Y: Wah! What a cute bouquet! Thank you, Itsuki-chan!
F: And this is from me. Open it
Y: Yes!
Y: Ah, this is!
F: The stationary set that you wanted. It''ll be really terrible if you drop out because of Hero club's activities. So use this and study.
Y: Uhya~ Roger!
K: For once, I'll also give you something.
Y: Tha... Eeeh!? He-heavy! What's this!?
Y: Th-these are! ...Iron dumbbells!?
K: Well, there's no way you can beat me no matter how hard you train but still, put some efforts into it.
Y: G-got it. But these... Just how many kg are they?
K: 5kg for one, and 10kg for both.
Y: I-I... see... (Can I even bring them home...?)
T: ...Now, let's all drink kelp tea to celebrate.
F: Kelp tea huh... So plain.
I: Hm? Tougou-senpai, what about...
Y: ...!
T: About what?
I: No, nothing...
T: Can you pass around the teacups?
I: Ah, yes...
Y: ... (It's not like I had any expectation but... So Tougou-san really did forget...)
F: Well then, in celebration of our Yuuki Yuuna's wonderful birthday, cheers!
All: Cheeeers!
Y: Thank you, everyone! For gathering here for me, and even gave me presents! I'm deeply thankful!

I: Hey... Did Tougou-senpai forget her present...?
F: No way... It's Tougou we're talking about here.
K: I bet she's gonna give it to her in secret later.
I: You sure?
K: That's how she is...

Y: Ehehe, I'm so happy. Having all of this done for me, I really am blessed! (But still, for just a little bit, I feel... lonely)
T: ...

Y: Hah~ Today, I was so surprised and happy~
T: Good for you.
Y: Ah, yeah. But, sorry. Tougou-san, you were plannning to go visiting grave, right? Yet because of me, I'm sorry.
T: Here, this is from me.
Y: Eh? Present? For me!? Can I open it?
T: Of course.
Y: A photo frame? It's a picture of me... and Tougou-san. Ah, the image just changed into another one!
T: Memorable photos that we took together. They're all pictures of me and Yuuna-chan so I was too embarrassed to give it to you in front of everyone.
Y: So... you didn't forget?
T: There's no way I'd forget such an important day.
Y: Really...?
T: It's the most important day in a year.
Y: Even more than visiting grave?
T: More than visiting grave.
Y: Tougou-saaaaan! Geeez! You're the beeeest!
T: Yuuna-cha... It's hard to breathe

~Tougou's birthday~
Karin gives her an airsoft rifle.
Itsuki gives her a confectionery making set.
Fuu gives her a book on warships.
Yuna struggles on coming up with something to give, so she calls Togo up to the school rooftop at night.
Yuna says she couldn't think of anything to get Togo, so instead...
Togo: Instead...!?
Yuna lays a blanket down on the ground and asks Togo to lie down on it.
Togo says she's not emotionally prepared.
Yuna talks about the constellations with Togo and how they have the same sign.
(>Jajaan! The compatibility between two Aries is the best! It says they can easily get close and be with each other forever!)
They lucked out since just one day later and Yuna would be a different sign.