Confusingly enough, it goes by the names of...

Water Summer ~Suika~ OVA Soundtrack.
水夏～SUIKA～ OVA版サウンドトラック.
Wet Summer Days OVA Soundtrack.


Source: https://vgmdb.net/album/9333

I was just wondering, does anyone know where I can get a hold of it? It's supposed to be really rare (I'm told at least)...

Any help would be appreciated. :D

Disaster averted, I found it. :S