He seems to hesitate at the suggestion. Mostly because....

"Well... it's a bit complicated but i guess we could try? Maybe we could have some group effort to preserve everyone's memories? I mean, we're all on the same boat here.."

And, beside a very few things, Kel doesn't have a lot to hide to begin with. they all involve the two siblings present so there's no chatting about them.

"Well, let's try to stay positive. Mh? I'm just... it is something in my mind."