I'm not a Japanese, sorry for the English description and video subs.
The material used is Z-KAI.
The original song is "Spring School (#317)" by Nijyushichi Ji (27時), the UTAU vocal part of which was lost by the author. The Jinryoku Vocaloid part of this OTOMAD is reconstructed based on my memory of the original melody.
[Chinese language warning] You can find the song here: https://www.bilibili.com/video/BV1AT411P7yA/
It's sort of an imitation (KAIWAI) work, of which I merely know its surface.
So, hope you enjoy the work.
