I Became the Only Healer in This World

I am a healer who is addicted to games. Somehow, the world changed and I became the world's only healer. [There is a place that needs you, a unique healer. Will you respond to the summons?] What? You have tanks but no healer? No, wait. Isn't that just bad balance? [The constellations that are watching you complain that this is not a game but reality!] It has been several decades since the gate appeared. I heard that a lot of strategies and data have been accumulated over the years. Why is everyone proceeding so inefficiently? I was serious about my strategy, so I just tried my best to close the gate. "It was you who saved me. I made it so that only you can see it," said the former first place in the rankings. He was rumored to have been betrayed and went into hiding. "I need you. My savior," said the head of the world's top ten guild. "Don't abandon me... because I can't breathe without you," said the current top ranker. I was too busy clearing the gate, but strange guys started to come by. (Source: Kakao Entertainment Corp., translated)