The OVA Astaroette no Omocha is a three part short story series. In the first story, Lotte and Asuha find themselves searching for details about their school project. In the second bit, is the backstory to how Zelda came to be Lotte's bodyguard. The final of the three, is a flashback of how the queen met Naoya and how they conceived Asuha ten years prior to the events in the anime.
(Source: ANN)+ More
Characters & Voice Actors

Touhara, Asuha
Main
Tamura, Yukari
Japanese
Touhara, Naoya
Main
Satou, Rina
Japanese
Ygvar, Mercelida
Main
Minaguchi, Yuko
Japanese
Ygvar, Astarotte
Main
Kugimiya, Rie
Japanese
Asgrim, Mistrune
Supporting
Matsuki, Miyu
Japanese
Austri, Lucca
Supporting
Hatano, Yui
JapaneseRecommended for you
Kamen no Maid Guy
TV
25m
Nanatsu-iro Drops
TV
24m
Negima!? Magister Negi Magi
TV
23m
Paulette's Chair
ONA
3m
Princess Princess
TV
24m
RahXephon: Pluralitas Concentio
Movie
116m
Ze Tian Ji 2nd Season
ONA
20m
Everlasting Immortal Firmament
ONA
15m
Sakura Trick
TV
24m
Re:Zero kara Hajimeru Break Time 2nd Season
Special
3m
Show By Rock!! #
TV
23m
Ze Tian Ji 4th Season
ONA
20m
Thermae Romae
TV
24m
UQ Holder!
TV
23m