Promise at 20 years(1992)

Promise at 20 Years is a Japanese drama following Yuki, who returns home on her 20th birthday to reunite with her penpal Junpei. Their joyful reunion shatters when she discovers Junpei caused her brother's death three years earlier. Despite this devastating revelation and fierce opposition from her father and aunt, Yuki chooses to forgive him and they decide to marry. Two days before the wedding, Junpei is stabbed by a former associate. Determined to honor his commitment to Yuki, he endures his injuries to complete the ceremony. The series explores themes of forgiveness, redemption, and the power of love to overcome tragedy and betrayal.