Phoron Tatara's no ordinary musician. As one of the rare Dantists who can summon elder spirits using music called Commandia, his gift is so strong that his spirit partner is none other than the infamous Corticarte Apa Lagranges. Sure, she may look like a young girl in her human form, but you don't get nicknames like The Crimson Annihilator and The Bloody Duchess for sitting back and watching the daisies grow. Now, at the behest of the Tsuge Divine Music Player Office, this dynamic duet travels the continent of Polyphonica on Phoron's combination motorcycle/organ, following the song of the open road, orchestrating rescues and generally fixing whatever's baroque! Some musicians wait for a muse to hit them, but Phoron makes his work for scale! (Source: RightStuf)

A short special included on the second volume of Baka to Test to Shoukanjuu Ni! Blu-ray/DVD release.

With the conclusion of an unforgettable summer break, Aoi Yukimura remains invigorated to continue pursuing her new hobby in mountaineering. Having braved her fear of heights and fulfilled her childhood promise with Hinata Kuraue, any opportunity to go climbing intrigues the first-year high school student—including a second chance to reach the summit of Mt. Fuji. Although the formidable yet exciting trip is planned for next summer, Aoi is already preparing as much as she can to guarantee her success this time around. However, as budding expectations blossom with the shift of the seasons, ascending the unexplored peaks of colorful endeavors begins to strain the bond between the two longtime friends and the perspectives they share of the future.

An OVA bundled with the eighth volume of the Seitokai Series Spinoff novel. The story itself takes place on Valentine's Day where you could see how the second season's heroines handle the awkward situation of giving a gift to the main character, Sugisaki Ken.