Author's note: Um, ya, I've gotten this idea into my head after animeandmangafangirl posted a review to Quilla and I's story Twins Time! So... ya, I've rolled this idea around, contemplating on: what if Okuda's twin is her exact opposite and is like really close to Asano? What if her twin is evil? What if she also becomes an assassin along with her sister and outshines her, creating some rivalry and tension? How would Karma react to the whole thing? If he got caught inbetween the two?

Eventually I keep coming back to one idea: Okuda Manami dies, and her sister replaces her. So this is the idea I went with for this fic. This story kicks off right after the episode when Okuda first tries to poison Korosensei and fails. So, there will be lots of chapters mostly following the anime, but obviously some changes in character relationships and stuff because OC! yayyyyy! :D

Replaced

~ Your Will ~

"Okuda Masami, your sister left a note for you, we found it in her pockets." the leader of the self-defense force, Karasuma Tadaomi says gravely, placing a piece of yellow paper on the table in front of me.

I take the note, and read it over carefully, a knot forming in my throat as I look at her shaky handwriting.

Dear Masami, I'm sorry. I don't have much strength left so I can't explain everything. I know that I can't be saved. My classmates in E I wanted to help them. Karasuma will explain to you what it is that we were doing. Please don't tell my classmates that I'm gone. I don't want to trouble them with such things, because our mission is more important. You have to replace me, and support them. Do your best, I know if it's you everything will work out. I love you, goodbye.

"You're an idiot.." I whisper, tears pouring down my face. Idiot. Idiot.. Idiot! You're a fool, to think that you would keep something like this from your own classmates! "STUPID IDIOT!" I yell, crumpling the paper in my hands angrily throwing it onto the ground. I slam my fists on the table, lowering my head, trying to stop my tears. "It's not fair... it's not fair at all. You always make things like this difficult! I hate.. hate that about you."

I don't know how many seconds, or minutes pass by, but Karasuma clears his throat and asks in a calm, professional way: "Okuda will you join E as your sister requested?"

I want to say no. But there's that heavy feeling in my chest: guilt. I have to say yes, I know I do. But it feels so wrong. I'm not like her, I don't want to help this mission or whatever.

I've got to suck it up and do what you asked, Manami. I have to, whether I like it or not. "Yes." I answer, rubbing my teary eyes looking up at Karasuma. "Now tell me: what do I have to do?"

Rest in peace, sister. I'll do what you couldn't. Because it's your will.