First Love Again 
Korean Title: 첫사랑 만 세번째
Episodes: 6
Disc: 1
Audio: Korean
Subtitles: English (Excellent)
Starring: Jin Gun, Jeon Chang Ha, Kim Jeong Seok, Jung Hyun Ji

Synopsis:
Popular web novelist Yeon Seok has a big secret. He lives for 300 years to reach his first love. He is looking for his first love, Jeong Ha Yeon, who suddenly appears as a 25-year-old man. Yeon Seok, who never thought his first love would be reborn as a man, initially pushes Ha Yeon away. However, since Ha Yeon is Yeon Seok's editor at Sin Bi Books, Yeon Seok cannot escape Ha Yeon and they naturally become closer over time.