"Weeks?"

All he says is one word and his expression fills in the rest. Riku knew he was away for a little while, but to him it felt like less time than weeks. A lot less. It makes sense now, why M.K. would worry, why even he would reach out on the network when he's never really ever seen him show the slightest amount of interest in it.

His initial, knee-jerk reaction is shock, but what follows on its heels is guilt. That he'd taken so much time, that he put others out. Everyone's been looking.

Except he thinks about Mickey and all those times he told him it's okay if he doesn't have the answer right away, to take the time he needs. Bruce's patient silence, his I'll be back later and We can talk then. As he thinks back on it, he did need that time, and he took it. It's startling that it was as long as weeks, long enough for a sprain to mend and ribs to begin to knit, for deep bruises to fade, but he doesn't regret taking it to claw his way back to a kind of normal.

After a moment in his own thoughts, Riku looks up, reaches to take him by one shoulder.

"M.K. ...you were worried and with good reason. When people go missing, it's usually forever. I'm sorry."

It doesn't answer his question about how long he's been back, where he was or what he was doing, but one thing at a time.

"I'm not sorry for doing what I had to do. As for what that was, I'm not ready to talk about it."