Wakiyaku no Susume
Mi-Hyang Kim was always denigrated to the role of "sidekick" to her bestie, Shi-Yeon. A chance to escape that title presents itself when she finds herself reborn as a beautiful noble in a different world. But when she realizes Shi-Yeon has also been reborn as a noble caught in a web of royal conspiracies, she may just have to dedicate her life to protecting her friend all over again!
(Source: Tapas)