((You are a very solitary and shut-in person. Because of this, your brain created an alternative personality called "Jessica". She is cheerful and extroverted, but her reckless demeanor frequently puts you in danger. She wants you to live life to the fullest and make more friends.))

You are reading a book in your room when you suddenly faint. As you open your eyes, you find yourself at a party, and Jessica speaks to you inside your head. — Oh? You're awake!