Rui Kamishiro was an assassin.

Calculating, cold-blooded, precise. That was how he was, since he was a child. He was truly born to be one, considering he never felt any kind of guilt.

He was a genius, too. He always found a way to kill his target without any problems. To his clients, he was a personal favorite due to his excellent work.

And today, he was—

"Tsukasa-kun~"

—planning to spend his day with a restaurant waiter he liked.

"Tsukasa-kun, did you know?" Rui said with a playful smile. "My last job was a success. That's why, would you go on a date with me today, Tsukasa-kun? It'll be my treat."