Every morning, incoming first-year Taiki Inomata hurries to his high school gym in order to further refine his badminton skills. However, his true motivation stems from sharing the otherwise empty gym with second-year Chinatsu Kano, Taiki's crush and the star player of the girls' basketball team. Although Chinatsu seems unapproachable, Taiki gradually finds opportunities to get to know her little by little. Unbeknownst to Taiki, his tireless work ethic and admiration motivate Chinatsu to work harder and strive to achieve her greatest ambitions. When her family must suddenly move overseas for work, Chinatsu decides to remain in Japan and shoot for victory at the national level. With nowhere to stay, she is taken in by Taiki's mother, who is longtime friends with Chinatsu's own. Overwhelmed with the new reality of living alongside the girl he loves, Taiki resolves to join Chinatsu at the national level in his own sport—and grow closer to her in the process. Still, despite being good enough to catch his coach's eye, Taiki must fight an uphill battle to qualify for a spot on the starting team. Cheered on by both Chinatsu and gymnast Hina Chouno, his childhood friend, Taiki aims to make a name for himself among his powerful upperclassmen.

Ichigo Kurosaki is an ordinary high schooler—until his family is attacked by a Hollow, a corrupt spirit that seeks to devour human souls. It is then that he meets a Soul Reaper named Rukia Kuchiki, who gets injured while protecting Ichigo's family from the assailant. To save his family, Ichigo accepts Rukia's offer of taking her powers and becomes a Soul Reaper as a result. However, as Rukia is unable to regain her powers, Ichigo is given the daunting task of hunting down the Hollows that plague their town. However, he is not alone in his fight, as he is later joined by his friends—classmates Orihime Inoue, Yasutora Sado, and Uryuu Ishida—who each have their own unique abilities. As Ichigo and his comrades get used to their new duties and support each other on and off the battlefield, the young Soul Reaper soon learns that the Hollows are not the only real threat to the human world. [Written by MAL Rewrite]

The year is now 2041 AD. A new enemy called Zeravire suddenly appears in the solar system, destroying all military installations it comes across. However, a wealthy man named Klein Sandman is already aware of this planned invasion and had been secretly preparing his army for battle. His trump card is Gravion, a giant robot that utilizes gravity as its source of energy. Meanwhile a young man named Eiji secretly enters Sandman's base in search for his missing sister. It is there that he meets another young man by the name of Toga... These two must now fight together with four other individuals aboard the super robot, Gravion to fend off the Zeravire threat.

After Gravion was able to use its ultimate attack, the Zeravire threat seemed to have temporary stopped. However when it rises back up all of a sudden, the Earth Gult and its trump card, the super robot Gravion, is needed to defend this world again. All this while, the EFA is planning to create their own weapons to counter the Zeravire, the Grand Trooper. Now as they attempt to fend off the Zeravire, the people of the Earth Gult and EFA must protect their future as well as confront their pasts, and unveil the mysteries of the Zeravire.