Mikado told you to meet in the storage room after the trial where Kanade and Hibiki were executed, so you sheepishly head there and look around for Mikado, the wizard appearing in front of you with an angry expression.

"Iroha, you had one job. I thought, "wow, maybe Iroha finally did something right!" Imagine my disappointment when the culprit wasn't you, and it didn't even replicate the case at all!"