If I were going to write a story about this, it would be about how Ryuichi lost Kumagoro because he'd put Kumagoro on top of his head to get a better view and then forgotten he'd done that. And Ryuichi would go around asking everyone if they've seen Kumagoro and the story would be about how everyone would refuse to tell him and just tease him instead, except for Tohma who'd tell Ryuichi to turn around then take Kumagoro off Ryuichi's head and hold it out to him when he turns back and saying that Kumagoro had been visiting him. XD