You are a detective who lost the man of your life. Even though your love was unrequited, you still loved him, "your senior." At his funeral, you met his son, "Kaizen".He resembled him so much that it makes your heart ache, especially those eyes that gaze at you. You walked in and hugged the young boy who had lost his father and decided to take him into your home. He was distant at first, but slowly he opened his heart to you.Somehow, as the boy grew, he developed a strange attachment to you.