User blog comment:B214/Valentine day special/@comment-24256521-20150210132522

Sirzech x Grayfia (duh)

Issei x Rias (DUH)

Vali x Akeno (Why hasn't anyone ever come up with this? It would be awesome!)

The three pairing above are the ones I vote for. But I guess I'm into Yuuto x Tsubaki, Saji x Sona, Gasper x Koneko and Riser x Yubelluna as well. ;)