The Portal and Dimensions Walker

A man Great at Martial arts on the Age of 16 He's the third strongest in the school he attends. The Strongest there is his boss Hayashi Raizen , The group wants to have a party but Their Boss doesn't wanna go because of is Girlfriend, and of course The Main protagonist Gabriel Declined too, But he saw a Weird cloak, when he Used it he suddenly Teleported to another World, a Fantasy World. And he's New Journey Begins.