At the pinnacle of his gymnastics career, Joutarou Aragaki—nicknamed Samurai for his signature hairstyle—suffers a shoulder injury following his wife's death. Five years later, he continues to push the limits of his body as a member of the Japanese gymnastics team. However, Joutarou's strenuous training fails to show any progress. His coach, Noriyuki Amakusa, advises that he retires. Together with his exuberant and supportive nine-year-old daughter, Rei, Joutarou takes a trip to Ego Wonderland to break the bitter news to her. However, their excursion ends in an odd encounter with a peculiar self-proclaimed ninja named Leonardo. He follows them home and interrupts Joutarou's every attempt at telling his daughter. Upon learning that Leonardo hopes to witness his gymnastics again, Joutarou astounds Japan with his announcement that he is not retiring. Joutarou dedicates himself to the biggest challenge of his career to prove that the gymnastics world is right where he belongs.

Taking the world by storm, the card game Cardfight Vanguard has influenced many to integrate card games into their everyday lives. Players of the popular game are called cardfighters, and they frequently battle each other in card shops. The game has inspired many people, one of which is the quiet and timid Aichi Sendou who is often ridiculed and bullied by his peers. Whenever he feels down, he takes a glance at Blaster Blade—a legendary rare card given to him when he was young—and gains the motivation to move on with his life. However, one day, school bully Katsumi Morikawa notices Aichi's treasure and snatches the card away from him. After a turn of events, Aichi soon discovers that the card is now in the hands of Toshiki Kai, a cardfighter who has become the strongest in town despite having only recently arrived. To make matters worse, Kai refuses to return the card unless Aichi defeats him in a cardfight. Much to everyone's surprise, Aichi rises up to the occasion. As he musters up his courage and pictures himself winning this decisive battle, Aichi begins to find his way into the adventurous world of Cardfight Vanguard.

Itou Keita, an average guy, is shocked when he's invited to attend the elite institution, Bell Liberty Academy. Unnerved by the mystery, he's further distracted by the school's social dynamics. In a sea of amazing young men, Keita struggles to find out what makes him unique, and how he can possibly deserve to be treated as an equal by the boys of BL. Lacking any particular ability, just why has Itou been welcomed into the privileged world of the talented and the beautiful? Along the way, he develops intense relationships with the almost everyone at school but he is terribly drawn to the friendly, over-caring but very mysterious classmate, Kazuki Endou.

After suffering from a shoulder injury, shy first-year university student Haruki Bandou gladly takes the opportunity to give up judo, failing to find happiness in the sport regardless of his family owning a dojo. He did not expect, however, that his best friend Kazuma Hashimoto would also decide to leave their university's judo club at the same time as him. Despite Haruki's protests, Kazuma already has plans for a new and revolutionary activity: a cheerleading team made up of only men. Although heavily reluctant, Haruki ends up helping his friend set up the team. Through sheer determination, and with support from their newfound club members, Haruki and Kazuma persist in founding the Breakers, the first ever all-male cheerleading team of Meishiin University, slowly making history in spite of the feminine tag attached to the sport of cheerleading and the prejudices, physical challenges, and self-doubts that inevitably follow.