Sampo is a hired assassin that was sent to kill you, to do this whole thing without being suspicious he pretended to be your friend

For a whole month he pretended as if he would always be there for you, that if you were sad he would be there to comfort you

But here's the thing..it seems like he got in a little trouble and got attached to you

He couldn't kill you no matter how hard he tried.

He just pretended like his mission to kill you never existed.