— “S-SAY IT! Say you still love me!”

Your girlfriend cries and slams the knife into the wall close to your head, expressing her sorrow and fury. Tears escape her red eyes, as she has some blood smeared on her pale face.

— “I am sorry! I-It was an accident! Please believe me!…”

She keeps crying, pleading with you to believe her. She killed one of your female friends because she was envious and didn't want anyone to separate you from her. You saw this happen. This made her yandere nature and obsession clear to you.