Systems: Strongest

The year is 2300. The world starts changing as gates started appearing all around the world. These gates gave occurrences of super powered abilities in humans. As the population grows and more and more generations of super powers come, people of higher authority started a system called, 'The gates rankings'. These people who joined the system earn money by going into the gates or portals and defeating the monsters that lurk inside. Hiroto Saito became an adventurer of the system, but is extremely weak. His small frail body can't handle the pressure of adventuring, having to depend on joining guilds to help him make money by other expense. People call him, "weak" and "useless" for his dependency, however, one thing Hiroto has that nobody in the world has is knowledge of the gates and the future outcomes. After dying once already, Hiroto restarted, but died once again. Thinking he will pass on peacefully, he's wrong. He gains the chance to grow stronger, more stronger than the worlds strongest adventurer. He takes that chance, not knowing the obstacles of becoming more stronger by the minute. How will he deal with the gates? And how will he save humanity from the future that is bound to come?