As Kaboku Kabo Kotani enrolls in Ichiran High School, he hopes to spend his high school days quietly to avoid standing out from everyone else because of his stuttering. While his friends join the school's basketball club, he looks to the dance club instead. However, due to an embarrassing memory from middle school, Koba has avoided dancing in front of others again, keeping him from joining the club. Things begin to change when Kabo spots his cute classmate Hikari Wanda dancing. As the two learn about each other, Wanda admits that she is not great with words either and prefers to express herself with her performances. This sparks a light in Kabo, and he decides to join the dance club despite his uncomfortable past. With Wanda and his new clubmates supporting him, Kabo sets out to improve his dancing, express himself freely, and create unforgettable memories one step at a time.

Tsukino Talent Productions is home to two up-and-coming idol units named Six Gravity and Procellarum. The units all live together in the same dormitory and try to juggle their budding careers and daily lives. At their joint handshake event, unit leaders Hajime Mutsuki and Shun Shimotsuki announce the Full Moon Festival—a collaboration concert in a few months. Excited about the upcoming event, these 12 male idols must learn to collaborate with each other in order to pull it off successfully.

Tales of old speak of the legends of Excalibur, a sacred sword. The sword is wielded by those who are worthy of its power, bestowing them extraordinary strength and granting them the title of Arthur. However, a divine miracle results in the creation of multiple Excaliburs, thus distorting the fabric of time. Aiming to revert time to its original course, a group of six Arthurs composed of Danchou, Renkin, Kakka, Yamaneko, Tekken, and Rurou are sent back in time when the abnormal Excaliburs were spawned. They are assigned with one sole task: to destroy the Excaliburs of the past—all of which total up to one million.

As the Second World War rages on throughout Europe and the German forces advance closer to Moscow, the days of the Soviet Union seem numbered. Their only hope is the First Squad, a special unit operating within the Soviet intelligence service that consists of teenagers possessing supernatural abilities. However, the unit's sole surviving member Nadya Ruslanova suffers from memory loss and is unlikely to take part in any combat operation. The next Moment of Truth—an event that happens once every 700 years, when the actions of a single man can change the entire course of history—is rapidly approaching the Eastern Front. In hopes of breaking the stalemate at the frontlines, a German occult organization called Ahnenerbe plans to summon Baron von Wolff, a medieval knight from the Northern Crusades, and his undead army from the underworld. To prevent this from happening, First Squad must gather once again, and it is up to Nadya to bring back her deceased friends to stop the Nazis from taking over the world.