Kimihiko Nezu endures a life marked by perceived constant mistreatment, finding normalcy only through his friendship with Masashi Kouda. Despite their bond, Nezu nurtures deepening resentment toward Kouda, ignited by envy over Kouda's stable, fulfilling existence. Kouda benefits from a supportive family and widespread affection—advantages Nezu lacks and grows to despise. This envy transforms into an obsession to dismantle Kouda’s ideal life. Nezu meticulously plots to seize everything meaningful from Kouda, specifically targeting his stepmother, stepsisters, and romantic partners through calculated deceit and manipulation, fueled by greed and vengeance. His actions trigger an escalating chain of consequences that surpass his initial aims. The betrayal and hostility Nezu instigates provoke unavoidable, severe repercussions, irrevocably altering both lives. The resulting conflict erupts into a pivotal confrontation born from the emotional and relational devastation Nezu orchestrates.