[He narrowed his eyes at the challenge. Now he had to take it.] I'll drink your challenge and make it look like water. Sounds like your kouhai had a weak stomach.

Only if we acknowledge the fucking universally gargantuan pain in the ass you are, old man. [He growled, but he smirked to show he was mostly joking. It was his revenge for the nickname.] If being annoying was a superpower maybe you could kill me.