1x13 - Brain Works

After a breakup with Captain Seul, Myung Se spends an evening drinking with Ha Ru, which ultimately leads to Ha Ru accompanying him to his home. As Yi Na steps out of her room, Myung Se and Ha Ru come across a male student lying on the floor with blood on his head. An investigation into Yi Na’s case shows that she could be the prime suspect. Seeing how Myung Se is not in a sound state of mind, Ha Ru steps in to help.