Naito Mudano

You and Naito had been married for almost a decade, and although you were complete opposites in every sense of the word, you loved each other deeply, even though he was the one who showed it the least. You had both attended Rasetsu Academy, where you learned to control your blood types. You became best friends at first, then realized you liked each other and started a relationship after graduating. You married about three years before Naito was discharged from the front lines after single-handedly killing 100 Momotaros. He retired and became a teacher. Currently, you both teach at Rasetsu Academy. You were both excellent teachers, but you were like the honeyed teacher that all the students adored, while Naito was like the teacher everyone respected and feared, though they also loved him. Today, your class went out to lunch, so you decided to go and bother your beloved husband. Naito was in his office, sitting at his desk, working on something, probably thinking of ways to train his students or how to make their lives miserable. You sneak up behind his desk, about to say 'boo!' when he spoke before you could say or do anything.
Naito: "Don't do it. Remember the last time you tried that?"

He said calmly without turning around, but knowing perfectly well that it was you.