Short summary: Rina finds out that she now shares a body with the assassin known as Mizuki. She visits the mysterious stranger and he gives a dagger with a moon on it.

Rina hesitated as she took the dagger. The transformation was horrible! Her body burned as she changed. "Very good. Welcome back Mizuki" the stranger said. "It's been a long time. Hasn't it,Gabriel?" Mizuki replied.
Gabriel smiled. "i'm so flattered that you remember me, my lady" he replied. "I'm still angry at you for letting Princess Mimiko seal me in that vial!" Mizuki said. "I know. It's been a long time, my lady. At long last, I've found you're reincarnation, and your soul rests within her" Gabriel said.
"You mentioned a target. Am I right?" Mizuki asked. "Yes. This is your target" Gabriel said. He handed Mizuki a photograph of an old man. "You have got to be kidding me! Too easy!" Mizuki said. "My lady, you have been gone for nearly 50 years. So far, you probably will have to do training, for this is your reincarnations' other life" Gabriel said.
"Fine!" Mizuki said. Gabriel smiled. "I'm not happy about this!" Mizuki said. "I know. Rina, your reincarnation, needs to learn the basics. "Do this assignment, and we'll talk later" Gabriel said. Mizuki scoffed. "I'll do it and believe me when I'm done you and me will have a long chat. Believe me" Mizuki said.
She left the dark street ready for her first assignment.