I'm Sorry, I Love You(2017)

I'm Sorry, I Love You is a Korean drama that follows Ritsu, a man abandoned by his mother Reiko in childhood and left to fend for himself in poverty. After a severe head injury leaves him with a terminal prognosis, Ritsu sets out to find his mother, hoping to reconcile before his death. When he discovers she's living contentedly with his half-brother Satoru, a pianist, Ritsu's longing transforms into a desire for revenge. His plans grow complicated when he reconnects with Rinka, a woman he once helped, only to learn she's Satoru's childhood friend. As Ritsu navigates his limited time and fractured family bonds, the drama explores themes of abandonment, redemption, and whether love can overcome years of resentment and loss.