The One Who Shall Rule The Shadows

A world where Mana manipulation is the norm and the protagonist who only has the ability to strengthen his body to a certain degree and time one of the worse manipulations. But he made a way to use it to his advantage. It was good for most parts. But then one day as his class went for live combat training as they do once a month. He encounter a slight misfortune in the form of some jealous male classmates because of how close he is to some of the school most beautiful girls. He was pushed in to what look like a void crack but what appeared in his view was grassy planes and stronger mana. He doesn't know what's happening back at home but while being here he has almost died a couple minutes after getting here. Luckily he fell in to an unground cave where his life hangs in the balance. As his life his fading and his mind becoming blank, he heard someone called out to him but since he couldn't move he couldn't only pleas with little strength he has to the someone to save him. Then in the next moment he heard a ding and a voice said something but he had already passed out. [Ding!... Host Has Met The Conditions] . . . . . . . . [Ding!... Welcome To The...... Let's read how our protagonist will live in his world after coming back from the other dimensions. And what other conspiracy that are left to overcome. Completely made up all fictional and it's has a long prologue of how he got to where the story with start at.