When Isaku Senagaki was five years old, the sudden loss of her parents left her in the care of her yakuza boss grandfather Tasuke, who raised her with a blend of strict discipline and hidden affection that kept her both safe and isolated. Now, as she approaches the threshold of high school, Isaku resolves to start fresh and earnestly pursue an ordinary student life, hoping that the shadow of her family's criminal ties will no longer define her and that she can finally find a sense of belonging among peers. All she truly wants is to make genuine friends, experience the warmth of romance, and live a life that feels normal rather than dictated by yakuza expectations.
However, Isaku"s aspirations are abruptly undermined when her overprotective guardian Keiya Utou—who is only 26 years old—decides to enroll in the same school by bribing the administration, all in a bid to shield her from the dangers of rival gangs and protect her from the underworld"s reach. While Isaku yearns for a reciprocated love, she finds herself trapped in a one‑sided infatuation with Keiya, who only regards her as the boss"s granddaughter he helped raise and expects her to uphold the family"s legacy. Her longing for a normal existence turns into an ongoing battle, and breaking free from her heart"s grip proves far more difficult than it appears, as she struggles to reconcile her past with her future and maintain her own identity.
Keiya"s relentless protectiveness and blatant disregard for her boundaries make it almost impossible for Isaku to move on, leaving her in a constant state of emotional turmoil and the relentless pressure of living up to her grandfather"s legacy.
