Discovering My Sister Plotted To Have Me Killed

Synopsis

After the family of three upstairs got murdered, a police officer came and asked if I heard anything strange. I was about to answer when words exploded in front of my eyes. [Don't open the door! The murderer is outside pretending to be a cop. He came to see if you witness anything.] [Don't believe him! If you talked, you would be dead. He hid an axe behind his back. You're going to be hacked to pieces.] [Although you died, your little sister survived by selling you out. Later she hooked up with the cop who solved the case and lived a happy life.]