High schooler Ganta Nakami has trouble falling asleep most nights. As a result, he is irritable at school, always searching for an opportunity to find a secluded place to doze off. On the other hand, Isaki Magari is a free spirit who is well liked by her friends, but no one is aware of her sleep disorder. She makes use of the school's abandoned astronomy club observatory as her secret sleeping bunker when she needs to get some shut-eye. As fate would have it, Nakami finds Magari napping in the observatory. When Magari discovers that she and Nakami have something in common, she offers to share her secret sleeping spot with her fellow insomniac. As the two find warmth in each other's company, the struggles they face start to become easier to confront.

During recess, Olivia, a foreign transfer student who doesn't know English, plays a game of "look-the-other-way" with Hanako Honda, a loud-mouthed airhead. Their rowdy behavior spurs the ire of Kasumi Nomura, a deadpan loner constantly teased by her older sister for her tendency to lose games. Not willing to compete, Kasumi declines Olivia's offer to join the fun, but eventually gets involved anyway and dispenses her own brand of mischief. Soon, a strange friendship blossoms between the peculiar trio, and they decide to form the "Pastime Club," where they are free to resume their daily hijinks. Whether it be failing to learn English, trying desperately to become popular, or getting caught by teachers at the wrong time, school life will never be boring when the girls of Asobi Asobase are up to their hilarious antics.

Loid Forger, an elite spy, is warned by his handler that he may potentially be reassigned from his ongoing mission, Operation Strix. To maintain his position, he must make significant progress toward the operation's objectives, which involves having his adoptive daughter Anya earn sufficient Stella Stars to become an Imperial Scholar at Eden Academy. After learning of a cooking contest that awards the winning student with a Stella Star, Loid researches the judge's preferred dessert to help increase Anya's odds. However, perfectly recreating the judge's favorite meremere requires more than just following a recipe. Thus, the Forgers embark on a vacation to the Frigis region to try an authentic meremere. Not all goes smoothly on the trip, as the Forger family ends up entwined in a sinister plot to reignite war between the countries of Ostania and Westalis.

Takashi Natsume has grown accustomed to his encounters with youkai through the Book of Friends, which contains the names of youkai whom his grandmother, Reiko Natsume, has sealed in contracts. These encounters allow Natsume to better understand the youkai, Reiko, and himself. 

The Book of Friends is a powerful tool that can be used to control youkai; it is sought after by both youkai and exorcists alike. Natsume just wants to live out his daily life in peace but is constantly disrupted by these experiences. If he is to end this torment, Natsume must explore more about the book and the world of exorcism, as well as begin to open his heart to those who can help him.

[Written by MAL Rewrite]