When the Professor noticed the couple of newcomers couldn't help but smile. Watching love flourishing, in its many ways, is always a treat. But then, was that... A devil? In a human institution's Correspondence lesson? Why...?

By the way they were looking at them, it seemed obvious they were running several stories in their mind, some of them widening the smile. Whatever the reason, it's obvious the Maven was important to him, enough to endure such "lowly" activity together.