The narrative unfolds with the quirky and eccentric manga artist, Senichi “Tsuyoshi” Hashida, experiencing a monumental career breakthrough. His wildly popular, albeit unconventional, romance manga titled *New First Love Hero* has officially been greenlit for a live-action theatrical film adaptation. The eccentric Donbrothers team—comprising Taro Momoi, Haruka Kito, Shinichi Saruhara, Tsubasa Inuzuka, and Tsuyoshi himself—are ecstatic, viewing this cinematic venture as the ultimate validation of their bizarre exploits and creative synergy. However, the glamorous film set quickly transforms into a chaotic battleground of egos, reality-bending absurdities, and sudden danger.As filming begins under the erratic direction of the eccentric auteur Director Kurokuma, tensions immediately flare among the cast and crew. The primary conflict revolves around the casting of the lead hero. Taro Momoi, despite possessing zero acting talent and an infuriatingly blunt demeanor, inadvertently lands the starring role due to his sheer, unnatural charisma. Meanwhile, Haruka and the rest of the team struggle with their supporting roles, leading to hilarious yet deeply frustrating onset rivalries. Tsuyoshi, intensely protective of his source material, constantly clashes with the director's wildly out-of-touch artistic liberties, which threaten to turn his delicate romance story into an incomprehensible disaster.Amidst the cinematic chaos, the production attracts the
unwanted attention of the Notito, mysterious otherworldly antagonists who perceive the film’s immense emotional resonance as a threat to their dimensional balance. Unleashing a formidable Hitotsuki monster born directly from the concentrated creative frustrations of the film set, the Notito crash the production. The studio is instantly plunged into peril, trapping the crew and actors in a surreal labyrinth where the boundaries between movie fiction and harsh reality completely dissolve.Forced to transform into the Donbrothers, the team must battle the monster while still in their elaborate, restrictive movie costumes. Taro utilizes his indomitable willpower to anchor the team, rallying his eccentric comrades to combine their unique
martial arts styles and sheer unpredictability. Through a series of gravity-defying action sequences and heartfelt teamwork, they overcome the monster's reality-warping illusions. Ultimately, the crisis is averted, the film is successfully completed, and the Donbrothers learn a profound lesson about the power of shared dreams, cementing their unbreakable bond as both heroes and artists.