In their last year of middle school, the five band members of CRYCHIC went their separate ways after an unpleasant disbandment. Each wrestling with their own regrets, the girls enrolled in different high schools, hoping never to hear from one another again. Meanwhile, Anon Chihaya transfers to Haneoka Girls' Academy in the middle of the school year. As most students play in a band as a hobby, Anon desires to fit in and spends her first days trying to recruit members for her own band, envisioning herself as the group's vocalist. She befriends Tomori Takamatsu, a shy girl who seems interested but hesitant about joining. As it turns out, Tomori used to be part of CRYCHIC, an experience that has scarred her deeply. Through Tomori, Anon meets Taki Shiina and Soyo Nagasaki, both former members of the same band. Although Taki detests the idea of playing with Anon, Soyo is delighted to help her out. Now with Soyo by her side, Anon's dream of forming a band is within reach—if only she could find a few more members.

The series stars Hat, the descendant of a hero who fought an evil king and sealed Devildom. Hat falls into Devildom and finds he has to defeat the evil king. (Source: AniDB)

Rebel organization Reunion has reduced the city of Chernobog to ashes and despair. That is only the beginning of its uprising against the nations prejudiced toward those infected with the highly contagious and deadly disease Oripathy. Now, the rebels have set their sights on Lungmen—a prosperous city infamous for its inhumane treatment of the sick. After witnessing Reunion destroy her homeland, Chief Ch'en of the Lungmen Guard Department's Special Inspection Unit leads her squad to defend her city. Meanwhile, Amiya, the Doctor, and the rest of the advanced pharmaceutical company Rhodes Island continue to oppose Reunion on all fronts. However, they soon find themselves in a deadlock against a powerful enemy: FrostNova, a Reunion commander whose fearsome wintry powers cause anyone unfortunate enough to stand in her way to slowly perish in frost.

After an accident that killed his father and left his sister with a disability, Shun Tokinoya's mental duress has led to him refraining from online gaming. Now a model high school student who feels remorse over his past lifestyle, Shun works part-time in the cybercafe owned by his childhood friend Nozomi Inatsuki in order to support his family. Despite this, an incident pushes Shun back into the world of online gaming. Following the sudden retirement of all players of FOX ONE—Nozomi's father’s esports team—Shun learns that the Inatsuki family is in severe debt. In order to repay the money they owe, Shun reluctantly agrees to participate in an online game tournament: Xaxerion Championship. Joined by their classmate Akito Sendou, the three of them scout for talented players to rebuild the team. Although they are lucky to find two promising additions to FOX ONE, it is too soon to celebrate: if Shun does not let go of his guilty conscience, the makeshift team stands no chance at winning the tournament.