I think I never told before, but there is a reason I created Haru and Ren to be Best Friends.
Is because of the "Digimon Duo Effect".

Like that the majority of the Digimon's protagonist has usually a dragon/dino motif and there always the other best friend/rival that has a wolf motif. I based in those characters in that effect, not only those two but Drake and Jack too.

So yes, that is the reason I thought in do a little parody of Kuyashisa wa Tane (Regret is a Seed), that is the ending theme of the reboot of Digimon Adventure.

I know Digimon Day passed, but here something extra.