In his high school days, Ichirou Satou maintained a secret identity as the legendary 'Maryuuin Kouga,' inviting ridicule and torment from his peers. Now determined to blend in and lead a tranquil existence, Ichirou considers life mundane until a chance encounter with a fellow student, Ryouko Satou, reignites the flames of his past. Ryouko, grappling with a similar fantasy-driven persona, sparks memories of Ichirou's own struggles. Despite his initial reluctance to engage with Ryouko, Ichirou's compassion is stirred when he witnesses her enduring the same bullying he once faced. In a bid to liberate Ryouko from her illusions and protect her from harm, Ichirou embraces his dormant hero persona, Maryuuin Kouga, as he embarks on a mission to shield his classmate from the shadows of their shared history.