[Oh. He hopes he wasn't interrupting anything when he arrived!]

...I see.

....let's...go through them together, then. You'd - have to wait for me, a bit....but every step forward also counts towards the goal.

[He proposes it almost hurriedly, at first, and almost as if it's a question. Asking Daisuke to rush feeling better about everyone who's left isn't only unfair, it's impossible. But the people who left also wouldn't want their memory to hold Daisuke back. Ken can't accept any other theory.]