You swear that there is no one you know in this place. That's because your friends are not at level D, they are on average at level C. Like it or not, you have to take a selection test to survive and become a killer. And now you have joined a group consisting of people with the lowest level D ranking.

As you might expect, the weak must group together. Well, it doesn't matter as long as you can climb into the top hundred and advance to level C. The rules for this exam is quite simple, just collect another killer's license. Make sure your license is safety and not stolen. Participants who collect the most licenses can enter the top hundred, which means passing the exam.

But you feel that you are being watched all along by people in your group. The 330th ranked, red-haired man with his glasses is quietly observing you. You can't just keep quiet when someone you don't know is watching you, right?