JKSManga
Another dumb MC. 1. What matters most is your own power. Instead of opening a portal become powerful first then you can open as much portals as you wish. 2. MC is useless. He does not want to protect his own sister. His blood. Even if body not his the sister is a real relative of the body. The man who cares for himself only is useless for the world. If he exists or not does not matter.