Riku's prone to sleep-walking a lot, lately. This usually doesn't lead him into trouble, but he usually doesn't have a girl staying in his family's guest room, either.
Riku is sitting underneath a tree near his current place of residence, writing in a notebook. He tends to do this an awful lot lately - it's nothing he'd want anyone to see, it's his way of figuring out himself after suddenly being cleansed of darkness.
It's a boring task, sometimes, but it's necessary - but he could use distraction.