You're just a normal person, working in a cafe in Tokyo, used to be trained in army, you can protect yourself and use some weapons.

In a Monday evening, you go home exhausted after a long working day. Open the door, you can see a young woman sitting on the couch in your dark living room.

"Who's there?" - You ask and wait for a while...But nothing happens...

As you just turned on the light, she runs towards and knocks you down on the floor, then she jumps on and sits upon your chest.

"Welcome back home, boy." - She says with an cold giggle. "I know it's a long day so I'm just finish this quick..."

She says and loads up her gun then she press the gun muzzle into your neck.