A short OVA that was bundled with the limited edition of the eleventh volume of the manga.

With no more death flags in sight, personable but dense Catarina Claes is finally able to lead a peaceful life surrounded by all of her friends and family. For that reason, she is determined to enjoy the school festival to the fullest without any concern on her mind. Unbeknownst to her, however, the story of Fortune Lover—the game she used to play—has yet to end. Even more characters make an appearance, each with their own agenda to fulfill, and new mysteries await Katarina and those she loves. Will there be any way to avoid a bad ending when Catarina cannot remember what happens next?

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.

To prepare for reincarnation in another world, Kelvin gives up select memories from his previous life in exchange for powerful abilities, additional skill points, and an S-class summoner title. As a bonus, the goddess facilitating his rebirth, Melfina, offers him a choice of any companion to give him a head start in his summoner role. Kelvin—who has fallen head over heels for Melfina at first sight—promptly chooses the deity, confident that his passionate feelings for her will resurface even without all of his memories. Kelvin embarks on his exciting new journey with Melfina as his guide. However, in order to summon his beloved goddess' physical form, he needs to acquire significant amounts of mana points—and the best way to accomplish this is to level up by fighting strong enemies and making contracts with even stronger companions.