Oh no, anime songs only? Looks like there's no BABYMETAL to insert here. Anyway. Since I'm not the kind of person into happy stuff, then here, have some Jigoku Shoujo BGMs instead (they're, background music from an anime, not really the OP/ED one)

AKA: Enma Ai's theme. You can hear this theme's notes on Sakura Fubuki [Jigoku Shoujo], Futakomori [Jigoku Shoujo: Futakomori], and Shiro Tori, Aka Tori [Jigoku Shoujo: Mitsuganae]

This too. My most pensive go-to.

Kumo to Rouba to Shoujo

Since there's no music, I hope this helps in studying and reflecting over your life choices. Heehee