Eternal Bond: a vow of everlasting bonds with a special someone

So, it's not actually marriage.

Hmm~

Then what's this Eternal Ring?

Huh

Does that mean...

Grah... why won't you become tempered...!?

Maybe back then, too...?

It's a charm to keep you safe. Literally a charm/talisman to ward off evil, but in this case, actually something to keep people from hitting on her