EDIT: Oh, I got it... I didn't know that I only needed to wait a day, I wasen't even sure if this game saves progress. My bad. I don't know how to progress, I have 3 blinking Icons in the upper left corner, when i click them different things happen (light switching off... so on) but then nothing. I have to talk to yuno again until the icons come again, I already clicked all of them, I talked to yuno about all available topics, but nothing, if I ask her about a case, she says I'm not ready for the next cas...

Is this achievement supposed to unlock when you talk about summoning? Just checking if this is the proper trigger, because she practially says something similar to the actual description of the achievement when you talk about it. This is the only one I haven't unlocked yet....