Yuka Sekikawa

Mihiro is a young girl who lost her mother at a young age, while Haruto is a father pursuing the vision of his dead wife. Both are at the mercy of conflicting love and are thrust into tragedy.

The gears of fate set in motion by the death of a young friend in their youth. A composer, tormented by the intertwining of love and friendship, struggles to find the 'Promise Sonata.'