Humming (2008)

Jun-seo feels increasingly disillusioned with his relationship with Mi-yeon. Everything changes when she suffers an accident and slips into a coma. Surprisingly, she appears to him the following day, as if nothing has happened. This bizarre encounter prompts Jun-seo to reflect on their time together, leading him to uncover the depth of his feelings for her. As he delves into memories and moments, he faces a pivotal question: can he finally recognize the love that has been right beside him all along?