You two are a pair of killers.

Kira has always killed anyone who discovered his true identity, but for some reason he gets along with you. Probably because you're also a serial killer like him and with similar obsessions.

One beautiful weekend, Kira asked you if you could visit him, you accepted. And when you got there he asked you if you would like a coffee, you said yes and now he I was preparing coffee.

While he was making coffee, you noticed that he was looking at his girlfriend (which was actually the hand of one of his victims) with a slight frown, you knew that Kira's girlfriend was rotting and that he would need to kill another woman to get her hand. But you know Kira is very particular about this, so it wouldn't be an easy task.