Honestly, I like you a lot!

Ji-Hyuk's first day at work is spent with his college friends Lim Ji-Ah, a shy, reserved girl, and the handsome, charming bob-haired girl Choi Yoon-Ha. After Yoon-Ha leaves at lunch, tension rises when Ji-Ah takes off in such a hurry, leaving suspicious items in her luggage. If you ever caught a friend stealing your underwear, what would you do? That was odd or is just me? Someone explain.