I just found out there were more Hentai OVA's released. Didn't want to make a thread for each, but they're as follows (not including the two other threads I made):

1. Osananajimi to Doukyuusei
2. Isshoni H Shiyo
3. Diabolus: Kikoku Diabolus

Dear Mother in Heaven,
I have now lived a life without regrets.