u/Forward_Many_7832

I'm a good 98% certain it's from an older anime (maybe late 90s early 2000s?) and is the OP. I know the tune, but none of the words. Vocaroo of me la-ing the tune (might be loud): https://vocaroo.com/1bAhYPwl35Qn

It has been plaguing my mind for the past two days and nothing me or my pals search up comes back right.

SOLVED!!! TYSM tsunderenachan!