After finishing their "debut," Kate, Emilico and three other pairs who started with them begin a new life as adults.

"The Shepherd," an urban legend of Shiomi Academy, is said to appear before hardworking students to grant them a wish. While engrossed in a book inside the school's renowned Great Library, Kyoutarou Kakei, a second year student and the Library Club's de facto president, receives an email from the Shepherd foretelling an event that will change his fate. Worried by the message, Kyoutarou rushes over to a nearby train station and encounters fellow student Tsugumi Shirasaki, whom he saves from being hit by a derailing train. Grateful for his heroic actions, Tsugumi joins the Library Club and invites Kyoutarou to participate in her mysterious "Shiomi Happy Project." Together with other new members of the club, they strive to make the academy a better place and uncover the identity of the enigmatic Shepherd. [Written by MAL Rewrite]

When Nashiko Jippensha's mother kicks her out of the house for being too loud, the high school girl needs to find a new place to hang out with her friends. Luckily, Nashiko's father owns a closed-down mahjong parlor that is perfect for her needs. While cleaning out the place, Nashiko discovers a talking bird who introduces himself as a mahjong spirit, encouraging her to try playing the game with her friends. Realizing that they enjoy the game immensely, Nashiko and her friends decide to continue playing and enjoy the new space they have to hang out.

The story revolves around William, an aristocratic family's progeny with rare intellect. One day, his uncle lost his possessions after his business failed. Fearing that his family's name has been tarnished, William returns home and searches with his family's butler for anything that can be converted into cash. A search of the premises yields an underground room left by an ancestor. In the room is a magical seal, and William unintentionally summons a devil. The summoned devil tells William his name Dantalion, and reveals that William is the designator who can choose the acting ruler of the demon world. (Source: ANN)