Pretty Haru  

Flower day, 꽃 같은 하루

As kids, Lee Haru and Yun Dong-Ha made a pact to become renowned in their respective fields - one as a baseball player and the other as a ballerina. Years later, when Lee Haru returns home, they both agree that upon reunion, they would form a romantic relationship. However, fast forwarding several years, it turns out that Dong-Ha, now known for his delinquent behavior, is thrilled to learn about Lee Haru's return. He anticipates meeting a beautiful and slender ballerina but is taken aback when he discovers that Haru does not conform to his expectations. This story can be found on Baka-Updates.