Refrain of Outro: Riven's Requiem

This is a love story penned by a boy 'lacking humanity' and a girl 'unlike objects'. A fantasy drama crafted from melodies, gears, and hearts!Special self-sounding technology that manipulates 'gravitons', and the humanoid mechanical 'Singing Dolls', the culmination of this technology, have become widespread, and the world has finally entered the 'de-electric' era. There is a young, 'broken' engineer, Tasuku, who 'only knows how to love machines'. One day, he meets a beautiful Singing Doll, and the Singing Doll declares—'I am Ghradi Sisters No.VII/Riven. From this moment on, I am your bride.' The situation begins to revolve around Riven, pursuers, the pursued, and also, those who are in love—'The Singing Doll that approaches humans too much' and 'The boy who only knows how to love machines'—The boy lacking humanity and...