Unaired episode 13 included with the fifth Blu-ray and DVD volume.

Years ago, all of the ghosts in a haunted schoolhouse were banished by a certain student. Now, they're back—and they want revenge... Satsuki and Keiichirou Miyanoshita are two siblings recovering from the tragic loss of their mother. After moving to their mother's hometown, they learn that the local school they have transferred to is an old building—one said to be haunted. Despite initially brushing it off as a silly rumor, the two soon discover that ghosts are indeed real and that they're after them! Gakkou no Kaidan is the creepy tale of the lives of these siblings and their newfound friends as they try to survive the school's ghosts—with a little help from their pet cat along the way. [Written by MAL Rewrite]

GA: Geijutsuka Art Design Class OVA. "I Want to Draw the Blue Sky"

The Sengoku era gave birth to many historical legends. One of them is Naoe Kanetsugu, the brilliant military general of the Uesugi family. Together with Maeda Keiji, a legendary warrior on the battlefield, who become lifelong friends with each other, they carve out a piece of history in the most dangerous and volatile time in Japan's history. The two men recall their beginnings and the journey they took to get to the accomplished position they now sit at.