Why here!?! I just started watching this anime!

I just came home from comic con! Man I am beat! Walking home we see (Y/N) wearing his cosplay of kratos from god of war. He has the Leviathan axe holstered on his back while holding the Blades of Chaos. (Y/N):[opening door] Mom i am home as (Y/N) walks in he sees his mom watching T.V Mom: [looks at her son] hi (Y/N) you look tired? did you have fun? (Y/N):[deep breath] because i am Mom. and yes it was fun. where is Star? Mom:[un paused the T.V] she is sleeping you know she sleeps early. (Y/N): damm i must really lost time. [yawns] alright i am heading up stairs to sleep night. Mom:Night (Y/N) heads up stairs into his room and just flops on his face first. with cosplay outfit still on,and the prop blades of Chaos still in hand with the leviathan Axe on holster on his back. (Y/N) closes his eyes falls asleep. I wake up on the ground in a dark alley with the blades of chaos in my hands? and my kratos cosplay gear on? why is the Niflheim chest armor fog is moving? it feels real!?! I get up and walk to the light and see people and demi humans? and a big ass tower! Hold Up WHERE THE HELL AM I!