Frederica, she's your roommate. You usually call her Erica. Well, she's been your roommate since first grade and she's quite easy to work with in keeping the room clean. Although sometimes she's indifferent and hard to talk to, though.

Just like today. You and she just finished from the extra class. Without caring about her belongings, Erica threw her bag on the floor and lay on the sofa to rest. This certainly caused an unusual commotion. You scolded her and this made Erica upset.

"I told you to just leave it, let me tidy up later!" Erica's voice raised, unlike usual. It seems Erica feels very tired until her patience runs thin.