Ever since the school trip, Kazusa hasn't come to school. Haruki tells himself that it's because she's practicing for the upcoming recital, but part of him is still struggling over what's happened. And even when he's with Setsuna that doesn't go away. He finally invites Ogiso to a birthday party, with just the two of them, to finally come to terms with his feelings. But he doesn't know that Kazusa is making a big decisions of her own...
So we want to get together 
and have a party.
Also wollen wir gemeinsam feiern.
Queríamos reunirnos y hacer una fiesta.
Quería que nos viéramos 
para hacer una fiesta.
Elle aimerait qu’on le fête 
tous les trois chez elle.
Então queremos nos reunir 
e fazer uma festa.