Yes, the Japanese drama " Sora " was based on a true story. It was about a young college student and a girl who met after graduation and experienced a romantic and complicated love story. The TV series was aired in 2013, with Hirosue Ryoko and Jing Boran as the leading actors. It received high popularity and good reviews.
Most dramas aren't always true stories. They can be inspired by real events but often have fictional elements added for entertainment and dramatic effect. Sometimes, they are completely made-up to tell a unique and engaging tale.