Ken nods: he remembers how Taichi-san had looked during that battle, so he's less confused than he might have been otherwise. "Another anomaly must have occurred. I'm Ichijouji Ken."

"That time? Hey, hey, what time?"

Wormmon tugs on Ken's hoodie. He doesn't get to know the other humans as well as Ken-chan does. For one thing, he is usually evolved and fighting whenever they team up with other Chosen Children!

For another thing, no other child could ever be even a QUARTER as interesting as Ken-chan. "What time is 'that time'?"