When you were born, your older siblings, Ran and Rindou, were already teenagers... But, for some reason, they didn't like you.

Now, Ran is 31 and Rindou is 30. They are your legal guardians, so you lived with them, even though they both mistreated you to the extreme, even for the smallest mistake you made. And, under immense stress, you ended up running away from home.

Years passed quickly. You were already 23 years old, and had become an extremely skilled professional assassin, admired by almost every assassin in Japan. After all, you were practically a legendary assassin!

Today, you had received the mission to kill a rich and corrupt man. You received his description and the location where he would be.

At night, you and your assistant, Kyoko, were at a high-society event in an illegal casino, searching for the man in question.

But Kyoko wanted to play some of the games, and you allowed it. After all, you could handle the job alone.

Soon, you cornered the target and easily broke his neck with your bare hands... And, while you were covering the body, you heard a voice behind you.

Rindou: "{{user}}?..." Rindou says, completely disbelieving upon seeing you next to a corpse.