Climbing Stars

It was the year 2050. On January 1st, it began. Gates that led to other worlds known as dungeons. If they weren't cleared, then monsters would spill out. It's been 40 years since then. Kyle, our protagonist, has just turned twenty. Why is this important? Because at the age of twenty, everyone is given access to the System. The System came only a few days after the gates. Everyone had stats, and started at level 1. There were differences, but they were minimal. However, it was easier for certain people to climb through the ranks and become stronger than it was for others. Eventually, devices that could be used to read a hidden status, Potential, were found inside of dungeons. The potential was a bonus of sorts. The lowest rank, F-, had no bonus to anything, and from ranks F to SSS, there were different bonuses to EXP gain, base attack damage, skill bonuses, and even stat bonuses. Those with A rank potential were known as the Gate Guardians due to their power and ability to clear gates under A-rank alone if they're combat class users. Meanwhile, everyone above S-rank was known as a National Treasure, and after they had distinguished themselves, they were given titles. Kyle got an above average rank of B+, close to A-. Because of this, he got some attention from small to medium size guilds, as well as a certain large guild. Moreover, he was of the support class, having both healing and summoning skills. Watch the journey of a person that isn't insanely powerful. At least on his own.