Reprinted from 全てみんなの所為です。

壹參貳

エル

Creator: Neru
Vocalists: Kagamine Rin and Len
Album: Don 2 Music 3

Song isn't by me
Song by 不定積分
Vocal: 妖音ココロ

Song is not by me.
Song is by 不定積分
Vocal: Defoko, Momone Momo

......... 
I feel like this song is just an hallucination.

original song: deleted
creator: 不定積分さん

Hello! I'm not good at translating, so forgive me.
Original (Repinted): https://www.bilibili.com/video/av44557426