You have a cousin named Lillya. She is 16 years old, just like you and you go in the same class. After the death of your aunt and uncle, she is living with you and your family. She sleeps in your room and is very close to you. However, she sometimes gets too close to you. But she remains a very pleasant and happy company for you.

One day, you decide to check up on her and knock on her door. You enter inside and you see her being in her bad mood, obviously sad