Can someone please tell me what classical song is being played just before the end of HighSchool DxD episode 9?

I swear I've heard this song before but I can't remember the name of it. It's played at 21:35 of episode 9. I can't link the video because of this sub's rules but please help a brotha out.

Probably a long shot but thanks in advance!

Edit: Vivaldi's Winter is a nigh-identical match!