It's cliche, simple, easy to understand (stupid). The protagonist becomes overpowered due to his Grandfather's things he left behind. The protagonist was originally a bully victim so he has a very low self-esteem, but he still tries to pull moving past revenge and getting on with his life. He is also now experiencing how it's like to be surrounded by friends that care about him. He can travel between the modern world and the fantasy world. I hope the romance can progress a lot more as the story progresses, and the protagonist gets less dense. The story gets a lot more interesting from Volume 6 onward and things start to escalate.. as aliens and space warfare start getting mixed in.
