"My sense of humor is as sophisticated as ever," Master Reina corrected him.
"…Sure thing," skepticism was palpably dripping off his voice.
"You don't seem very convinced."
"Your humor has the sophistication of that of a teenager who just learned about the bees and birds," Rui scoffed.
"Is that how you speak to a teacher you haven't seen in five years? I haven't forgotten that you didn't invite me to your assassination!"
"What assassination?" Rui innocently replied. "I haven't assassinated anybody in my life. No ma'am. Not one soul. This pupil of yours is a law-abiding citizen."
"Huhu…That was the right response," She nodded approvingly.
"This no assassination, is it?" Master Gurren asked, having returned to normal.