It has been three months since I comeback from another world. The Level Up system is also follow me up, having a highest level as a Hero and a title of "King of The World" even though I have comeback to my original world what is the real used of this power? There is no threat in such a peaceful world like this, but I should be happy am I?..

I walking in a hallway of the school into my class, yeah one day I am being called into another world as a Hero in a way to defeat Demon King but, after hearing the true extent of Divine beings manipulation towards us, we worked together to defeat them. At that time I was surprised that Demon King is actually a very beautiful women named Alice and we ended up married and having one daughter named Lily. I am so happy, having a beautiful family, but suddenly The Level Up System ringing one day and forced me to comeback to my world, how sadness after all I achieve and what I got.

I arrived in my classroom and sitting at my seat in very front of teacher's desks, putting my bag and sitting. This daily activities are so boring, if only I can met my wife and daughter. I have live in another world for almost fifty years, and all of that fills with war and bloody battle, only the last ten years I living a good life with my wife and daughter. I really miss them. "Hey, I heard we will have a new homeroom teacher and new student today" I heard that conversation betwen my fellow students. New teacher and new student I can guess that both of them related each other. After several minutes teacher finally comes "So, today you will have a new homeroom teacher. You can enter now Alice-san" As that old teacher said that, he get out of the class and then new teacher appears. My eyes widden, oh my a white hair, golden eyes, and that's beautiful aura. "I will be your new homeroom teacher. My name is Alice".. Alice, my wife..but..how? "Oh, and yeah also, we have a new student. You can come out now dear" Alice said in her eager tone. Oh, god this allure don't tell me, that black hair similiar to mi