Kyungcheon is a pianist-in-training who loses his heart and becomes a milk cow. He lives as a man during the day, but becomes a milk cow at night and eats grass. Meanwhile, with the help of wizard Merlin, a satellite … Yoo Ah-in, Jung Yu-mi, Lee Don-yong, Hwang Suk-jung, Chang Hyung-yun, Yeon Sang-ho, Hong Deok-pyo Added on Amazon Prime 2023-03-28. Youtube Trailer