The Memory Eraser (2020)

University student Ryoichi Yoshimori is head over heels for his older girlfriend, Kyoko Sawada. Just as he proposes, she vanishes without a trace. Days later, Kyoko returns, but shockingly, she has no recollection of their relationship. Determined to uncover the truth, Ryoichi enlists the help of his lawyer friend Chiaki Takaharu and childhood companion Maki Kawai. As they dig deeper, they encounter whispers of a mysterious figure known as Kiokuya, rumored to possess the ability to erase memories, leading to a gripping quest for answers and love's survival.