Emi grows tired of Kazuki's consistently reckless and cold attitude, eventually deciding to break up with him. However, even after their separation, he continues approaching her with the same indifferent demeanor, and she finds herself unable to resist, falling back into a physical relationship with him. Then one day, a man with the same name appears before Emi—could he be the same Kazuki from her past, or is he an entirely different man? As the truth remains shrouded in mystery, Emi becomes increasingly confused.