The Supporting Enchanter of Desperate Skill

Story:

In this world, skills determine the future. The protagonist, Yota, had only one unpopular support skill. It was already difficult to level up, and the growth of his Yota skills was slow, and the effect multiplier was low. As a result, the difference in ability with his friends gradually widened, and he was eventually expelled from the party. In desperation, I went down into the dungeon alone, but at the end of the bumpy road, I should have had a normal skill upgrade. I didn't have to do anything, but I will do everything!