…PROLOGUE,,,
"I'm sure by now, she's dead. Finally! I can just force Kazuya to love me back. Anyway, she's gone now. I burned her house along with her. I'm sure after she read that fake letter, she'd be wishing she were dead. She'll accept death. After all, she thinks Kazuya abandoned her! Hahahahaha! He's mine now! I'm really a genius! Hahahahaha!" she said while laughing when she was alone in her room. And she didn't even noticed… her tears were falling too…
5 years later…
"Yuui!!! Yuui!!! Aaaaahhhh!!! No!!! Help me!!! Aaaaahhhh!!! She's here… Yuui… Yuui…" the girl screamed as if she was fearing for her life. Just then a younger girl came rushing inside the room…
"Oneesan? Oneesan? Yamete!!! Yamete… Stop torturing yourself… Please… I don't want to see you like this anymore… Oneesan… Pull yourself together! Go back to whom you once were. Bring back my sister… My real sister…" Tenshi said and started crying. She hugged her elder sister, her only sister, tightly.
'Oneesan has fallen asleep again… It's been five years already and she still can't get over it. Honestly, if I were in her place I wouldn't get over it either… Killing your best friend? Who could ever get over that? I didn't know why she did it… She's my sister and I want to protect her. Until now, I have never said anything to anyone about what I know. But I guess it's time… My sister is suffering… I don't want to see her like this anymore… She's all I've got and I'm all she's got. This time around I'll protect her, just like how she protected me then… Oneesan… Oneesan…' Tenshi thought as she looked at her sister sleeping in her arms…
"Shibuya… Shibuya Psychic Research…" Tenshi whispered and fell asleep as well…