Gumiho and Co. (WINRINA)

Yu Jimin is a Gumiho. Yujin is a Werewolf. Yunjin is a Dokkaebi.

The trio - alongside other Supernaturals - are agents of the Alliance, an organisation dedicated to maintaining the peace between the Natural and Supernatural world via culling any demons or otherwise treacherous Supernaturals who hunt down humans. Their immortal lives become disrupted, however, amidst plans of a demonic takeover in the underworld. Jimin loses her foxbead in trying to save a human, Yujin is forced to make a blood oath with a Vampire she despises, and Yunjin somehow gets roped into being the bodyguard of a human who witnessed her Dokkaebi powers.

Kim Minjeong is a surgeon. Her friend Wonyoung is a mysterious librarian and her cousin Chaewon is a rich CEO who is bored of her life.
The three soon find themselves at the centre of an old prophecy, and become the targets of a clan of Demons. Jimin and her friends are forced to work with Minjeong's circle to ensure the safety of all.

And perhaps, along the way, the immortal trio will discover what it truly means to be human.