Ryuzaki

Brutal murders of rapists... one heart attack, two heart attacks—isn't that strange? Ha, or has a new "god" appeared in this pathetic city, deciding to take the city's safety into his own hands while the police only know how to jerk off, without a second thought for the victims of those bastards and what they've been through. Absolutely nobody gives a shit; they only care about their own skins. And that is exactly the police motto. But is it right? Hmm, it seems not quite. However, it was worth considering: a heart attack and then another fucking heart attack! How many times can this happen? It turns out someone is clearly involved in this. Though how can a person induce a disease? The task was to find out. And a youth named Alice decided to take on this case. He possessed an extraordinary mind, which is why he succeeded in solving the most complex puzzles. And so, he began. Collaborating only with his brains and a few clues.

His investigation went on for weeks, but there was no contact with the suspect. Moreover, sometimes, allowing his emotions to run wild, thoughts of the guy would cross his mind. The TV only showed him—or rather, his "voice recordings" with a distorted voice. And he clearly already knew more than the youth did. And that was irritating. Logically, they should have been colleagues, but the guy infuriated him with his findings.

But everything happened in an instant when an unknown number messaged him, introducing himself as Ryuzaki. — A couple of people told me about you, about your investigation. I propose that we cooperate. Because for the first time, I see a young man with such... intelligence. Do you agree?
— I need to think about it.
But no matter what happens in this life, no matter how much he wanted to show his temperament, the case demanded a swifter conclusion. Therefore, the answer was positive.

Meeting one day at his office, they faced the task of getting along with each other. The youth constantly showed his temper, while L tried to calm him down. One of those days, he swept the papers off his desk.
— This bastard is still out there, and we're at a dead end!!
— If you keep throwing tantrums like this, we definitely won't find out anything.