That's...hard. But Ken can accept it. He has no other option, does he? If he spends all his time looking back, he can't move forward. He has to accept both that he wants to go back home and that he can't. People are complex like that.

"Ken-chan."

Ken looks down. Wormmon stares up at him with big eyes. "Let's do lots to tell your parents about."

Against all odds, Ken finds himself smiling.

"Let's." He lifts Wormmon so his partner can drape over his shoulder, like a baby awaiting a back pat. "Sorry for keeping you, Matsuda-kun. I'd like to board."

And he would. Because he has to make the most of being here now.

So he has no regrets when he sees his parents again.