Singer:
Jane Callista (u can see it was credited at 0:05. Except the first lyrics, maybe she's the series singer and they edited it xD)

*Description:
For u who don't know or don't watch it, the another songs haven't to do dubbing a.k.a. subtitle only. ikr? -_-
So, don't request anymore songs that undubbed. I don't want to uploading subtitle stuff here..!

Btw, its intro video was made by its channel, and that 'lyrics-on screen' too, not made by me ;)