The otome game depicts a land of godless individuals who are under the threat of Nightfly O'Note - an enigmatic extraterrestrial intruder who entered the crimson world through the crimson barrier Scared. To combat the menace posed by Nightfly O'Note, the human race erected the LAG defense agency at the Ryūkyū Islands. The Scared Rider anti-Nightfly O'Note unit courageously fought against the danger but encountered complete obliteration on five occasions. Consequently, the sixth and most recent unit titled Scared Rider Xechs was constituted, comprising five young men. Yet, just as SRX was created, the Nightfly O'Note invasion came to a sudden halt. Stranded without an opponent to fight, the SRX members pass their aimless days grappling with mundane routines. Out of despair and restlessness, the SRX members establish the music band Odd-l's. Meanwhile, a young lady assumes the role of their instructor and commander at LAG, marking the commencement of a new chapter in the life of the young woman and the SRX. The tagline of the game, "That order, is it for love, or for death?" adds to the intrigue.