As someone who have been following vocaloid for the past 15 years I relate to the teacher in spiritual level. Back then its super niche and its like hiding in the shadow, but it was fun and full of love.
God, remember when the vocaloid trend is to make series of songs with overarching story...
Rereading the first chapter and Yuushin deadass about to hit Murai with a vase not for the bullying but because Murai said they are not friends. Yuushin is scary