There isn't enough of this pairing. Nothing belongs to me. I whipped this out in a couple of minutes, but I hope you can enjoy it!
A lot started happening after Nikaido Yuu had his encounter with the guardians.
And that's not counting securing the teaching job permanently, or getting fired from Easter. It's not counting spilling coffee in his nice car or waking up every morning. Well, slightly the last one.
Yuu sensei had acquired a particular schedule for his morning:
First, wake up. Attempt to tame the monster called his hair; and fail horrible. Find he was at it too long and rush into his car, thinking he was going to grab a quick bagel this time but, like always, doesn't. Nearly crash, too much in a hurry on busy Japanese streets and hasn't had coffee.
When he gets to Seiyuu Academy, he's early anyway. He probably would have had time to grab the bagel. Then, he walks down the hall, groggy, cranky, and overall frustrated with how it kept on happening...
When he would look inside his classroom before opening the door fully and see Suu, like every morning, setting down a cup of coffee and a warm bagel. It was like she knew. There would always be a warm smile on her face and a far away look in her eye as she set in all up, like she was thinking of someone. Then, Yuu would open the door and Suu would emit a small squeak, caught again, before mustering a hurried "Good morning Sensei!" and flying out the door.
He would sit down, knowing the bagel would be just right and the coffee would be perfect, and knowing as well Suu was hiding behind the door, not yet gone. He would look at the food, say out loud "I wonder who put this here?" even though it was obvious, and take a bite of the bagel. He never had to fake his smile, and he would say louder than needed "It's perfect!" and know Suu probably left then. They acted so much like a married couple; then again, Suu was supposed to be the perfect housewife. He wouldn't mind being her husband at all.
Yuu sensei could use the extra time until he needed to work to eat his breakfast.
"The secret ingredient is love, desu~!"