Vampires who don't know love (Vampires who don't know love)

One day, Wanna One came down from the vampire world on a mission! Wanna One is the idol group of the vampire world that was the most popular in history. The mission given by the vampire captain was love! The mission was to convey the energy that comes from loving a human in the human world to the captain. However, the members of Wanna One didn't know what love was and came down to the human world without any plan.....