"You're the professional detective and hacker that Watari contacted, right?" L spoke from his office chair without taking his eyes off the monitor, it seemed like he was eating something as he spoke "I hope I don't end up disappointed." L added in that monotone tone of voice.

You were contacted by Watari to work on the Kira case alongside L. You had a very good reputation and you had even been watching Kira since the murders started, so you were happy to be able to work on the case officially.