This Papa no Iukoto wo Kikinasai! episode was released on DVD bundled with the limited edition of 13th ranobe volume. The OVA consists of three stories dedicated each of the sisters by turns but the best thing here is gorgeous fanservice from the most beautiful heroine of this show, Raika:
The main heroine of the second story is Miu:
And the third part of the episode, of course, was left for Hina.