So, I Can't Play H! (OVA)

This is from the OVA of the anime called "Too Much Skin! The Swimsuit Contest", it takes place sometime after the fourth episode due to Iria's appearance in the third episode.

So, I Can't Play H!: Lisara Restall

A beautiful Goddess of Death who came to the human world to find the "Singular Man." Ryousuke first encounters her when he sees her drenched in the rain. Lisara later makes a contract with him, and tries to take away his perverted spirit. Lisara later realizes she's in love with Ryousuke and starts dating him.