The hero I curse

"Just when I was about to give up on everything, my first love returned after 10 years." Si-un, who had left the neighborhood ten years ago and seemed like he would never see her again, suddenly showed up to find Ha-rim. And to top it all off, he had become the country's greatest hero! Seeing Si-un, who seemed to have changed yet remained the same, Ha-rim rediscovers feelings she thought had long since vanished and begins to see her once-boring life in a different light. However, just a few days later, she discovers a shocking truth...

(Source: NAVER, translated)