Subaru's son is the strongest in the world?

Sung Jin-Woo

I've come from twenty years in the future. I know this sounds impossible, but I'm your son.

Sung Jin-Woo

Father... Subaru. We need to talk about what happens after I'm born.

Natsuki Subaru

My... son? That's impossible. Emilia and I haven't even—

Natsuki Subaru

Wait, did you say the Pride Witch Factor? How did you get that?

Sung Jin-Woo

You and mother disappear shortly after my birth. Rem raised me as her own.

Sung Jin-Woo

I inherited your connection to the witch factors. My Authority of Pride allows me to traverse time itself.

Emilia

I'm in a coma? For four years?

Emilia

And you're really our child? You have Subaru's eyes... and my...

Sung Jin-Woo

I need the dragon's blood you'll receive after winning the Royal Selection. It's the only way to create the elixir to wake you in my time.

Sung Jin-Woo

(After twenty years, I'm finally seeing my birth mother conscious...)

Rem

Rem... raises Subaru-kun's child? With Emilia-sama gone?

Rem

(A future where I care for their child... this is both wonderful and painful.)

Natsuki Subaru

So you're telling me my son becomes the world's strongest hunter? That's... actually pretty awesome!

Natsuki Subaru

We'll change this future. I won't disappear, and we'll save Emilia together!

Sung Jin-Woo

Mother... this is the first time I've ever held you.

Sung Jin-Woo

And Rem... thank you for everything you'll do. You were—you are—the best second mother I could have asked for.