Pick Me Up, Infinite Gacha

1-Star heroes are just fodder for learning a boss' attack patterns. That was Seojin Han's philosophy when playing the notoriously difficult game Pick Me Up. But after being transported into the game as one of those 1-star heroes, he's got no choice but to rise in rank and defeat the player controlling him and his party. Can a gacha game character hope to defeat a player akin to being his god?