
guys my brain aināt strong enough for this, can someone explain the ending to me?

Both switched with their mirror selves for sometime ago. Everything is served in subtle context as far as I can see. But from last chapter you can see their personalities from childhood is opposite of how they are now(fears and reactions) . And black hair doesn't have any memory after the incident. It seems now they completely became their reflections.
woo-young can woo me any day <33