Pure love romance, not high tension/chemistry

I want to see non-egoic unconditional love- so no enemies to lovers, power plays, possession, etc. Not intoxicating or obsessive, they can let each other go because it's pure. They see each other as equals from the beginning- doesn't mean they have to be the same level of wealth or social status. Love not lust. Usually to have love like this, they have to know each other from childhood or there's a fantasy element like they knew each other from their past life. It can be children's, YA, or adult fiction, but has to be romance and the main plotline. Not sure if this even exists.

No dark romance, tragedy, or triggering content.