Todos los episodios

Unas misteriosas formas de vida conocidas como "Fukashigi" están atacando a la gente. Sora Otosumi, el Maestro personal de la familia Mizuki, lucha cada día contra los Fukashigi para proteger a la estudiante de preparatoria Yuna Mizuki. Mientras tanto, la Zyunishi Doumei (una organización liderada por Kamuri Minetaka) reanuda sus actividades tras despertar de un letargo de 100 años para proteger a la gente de los Fukashigi.

Tatsuomi se infiltra en la familia Mizuki como tutor particular para investigarlos, cuando aparece un nuevo Inexplicable. Sora se transforma en My-Th, cuando de repente aparece Datt. Ella se transforma e ignora el asombro de My-Th para atacar al Inexplicable. Con su increíble capacidad para saltar, Datt acorrala al monstruo, pero My-Th se interpone y el enfrentamiento termina convirtiéndose en una batalla de tres.

Yuna conoce a Shiori, una niña cuyo papá ha desaparecido, y sospecha que es obra de un Inexplicable. Sora investiga también. Por otro lado, Tatsuomi, quien vigilaba a Sora, lo ve cambiando en My-Th frente al Inexplicable, y decide sacar su propio Drive y también cambiarse en un Kamen Rider propio.

Para traer de vuelta al padre de Shiori, Sora y Yuna se dedican por completo a luchar contra el Inexplicable, tras encontrar una pista, Sora le pide ayuda a Tatsuomi. El Inexplicable reaparece y Sora se transforma en My-Th, pero, una vez más, Rid interviene.

Tatsuomi is suspicious of Sora, who is unusually open about his emotions. Just then, Yuna sends them new Fukashigi information. Sora transforms into My-Th and challenges the Fukashigi, but Jyao, who is after My-Th’s transformation device, intervenes...!

After analyzing the Fukashigi that had fled, Sora left Yuna, who was complaining of feeling unwell, behind and set off in pursuit of it alongside Tatsuomi. When Sora transforms into My-Th in front of the Fukashigi, Jyao appears once again. As Jyao relentlessly targets My-Th, Vanken intervenes, shouting, “You’ve got the wrong person!” but...!

An unprecedentedly powerful Fukashigi appears, and My-Th finds even his finishing move blocked. He must defeat the Fukashigi for Yuna’s sake... Sora challenges the Fukashigi, which has reappeared. Furious at My-Th’s actions, Mutn lunges at him. Right in front of a worried Tatsuomi, Mutn transforms into a Kamen Rider. As the battle intensifies, a new enemy even appears...!?

My-Th suffers a crushing defeat at the hands of Maou, with no way to fight back. Sora is left on the brink of death. Tatsuomi asks Yuna, who is staying by Sora's side, why Sora started fighting in the first place. Having tasted the fear of death from Maou's attack, Sora can no longer fight... Tatsuomi heads to the scene where the Fukashigi appeared to take Sora's place. However, he is ambushed by the Fukashigi and is instantly cornered...!?