>>73481479There are two theories:
1. The song is too complicated for Neuro to sing it *well*, it has a lot of backing vocals, spoken sections and unconventional parts (Ui Beam), things Neuro usually struggles with in karaoke.
2. Whoever arranges the songs for Vedal doesn't want to work on the song because of its lolicon themes, despite being the most popular Vtuber song in history.