I found the episodes on YouTube with english subs and the episodes are not very long but they really funny! ♥ How Chizuru goes to an all boys school and some of the characters are students and others are the teachers. ♥ Characters like Hijikata are like the teachers trying to stop to stop the others and trying to discipline them but instead he breaks the rules lol!- Overall it's pretty funny to watch and its short so you can simply watch it on YouTube if you search Hakuoki SSL! -

Also when you search Hakuouki SSL you can also find a drama version that is longer and get to see more of the characters I watch a bit of that one and it's pretty funny as well so you do like the OVA maybe you could watch that after if your interested.