Aeri is just curious. (No, she's actually really scared and badly need some reassurance)

So she asked Minjeong, her classmate who the rumor said, can see ghost. Even communicate with them.

Only Minjeong who can reassure her. She needs to know whether the room she lived at the student dormitory is really haunted or not.

But Jimin, her super sweet but a weak hearted-roommate, Yu Jimin, should not know about this. 

That's why Aeri told her to put the headphones on and listen to some loud music.

Jimin did as what Aeri told her to.

But before Jimin can even press the 'play' button, Aeri already not-so-quietly throw the question to the little shaman.