It's okay! Matcha got over that day, so he'll forgive me!!! He's not like he was before!!!The killer is Naz...BzzzzzzAlley-oomph!!!What do you know about Matcha!!?Uh? Was I a magic sword?Hijiriiii!!SMACKDamn, that fly can fly!!!Get a grip, Hijiri!!!And I had nothing to do with it!!!Oh, shut your trap!!!Since it is a fly.♪No, no, you don't have to write a "The butler did it" message, do you!!? This is a meme from "The Case of the Portopia Serial Killer"; the original text is "The killer is Yasu". The author is playing on the visual similarity of "Yasu" and "Naz[u]".And what's the big idea of using a gag by Midori no Matcha? A.k.a. Midori (Green Tea).
