(A/n) I'm going to change 'You' to 'I' because it seems easier so this is a test okie dokie.Oh and there will be death note references.Let's get to it then~
   (Y/n P.O.V.)
   It was just a usual day in Ikebukero, well as normal as it can get. I was an assassin that was looking for a certain info broker.Why look for the biggest pain in the a#% ,you ask? He owes me valuable information on a certain 'Kira' who has been killing off my employers.It is really starting to piss me off.
   (Third person P.O.V.)
   While Y/n was a bit lost in thought. The damn info broker was watching with undying interest in the human.'She will be mine.~' Izaya thinks to himself.What he didn't know was you had noticed him . The only reason why you seen him was that stupid coat of his.
    (Izaya P.O.V.)
   "Come out Izaya, I know you are there" Y/n said with aggravation coating every word. "N/n chan~ I am quite aware you are in need of my assistance." Oh yay she glared at me how cute. Then she did something I wouldn't expect. She pick pocketed me and pulled out my switch blade  holding it it against my neck. (A/n in this he is going to laugh like Undertaker so don't say I didn't warn ya) I just couldn't help it i started laughing uncontrollably. She just pressed the knife deeper into my neck making it bleed. "Oi, what's so funny asshole" I smirk at her and push her hand aside lightly. "You my precious human are acting very cute today" is what I respond with.
   (Y/n P.O.V.)
I blush for some unknown reason and look away. My heart beat is going extremely fast. "Izaya what spell do you have me under?" You say almost too quiet for him to hear. "I just looooove you Y/n chan~" he chants as I am slowly walking away.before I have time to think he's right in front of me. He pressed a tag dosed in chloroform to me mouth and nose and I pass out . When I awake i am chained to the wall "WHAT THE HELL IZAYA?!?!" I scream. " You are a human i have a soft spot for. Therefore you are my weakness N/n chan~. " he says coming out from the dark. "You are the definition of insanity!" I reply angrily. And the motherfucker replies with

"Well, I guess you are insanity's weakness~

(A/n hope y'all like it he would definitely be a Yandere. If Yan chan didn't love Taro i would ship her and Izzy cuz they are both insane)