i think sekyeong isn't her in the past but she from the future like EunGyeol. like why she suddenly back to SK…
it's already confirmed i think. look at her briefcase, it's said ICN (the Airport Code for Incheon International Airport which opened in 2001) instead of GMP (the Airport Code for Gimpo Internation Airport which was the main international airport from 1958 to 2001)
Some people couldn't tolerate her over-kiddy voice persona in her previous drama(s), including me. I believe she…
i can tolerate her voice but for her cutesy look is not my cup of tea but she's definitely changing my mind in this Drama, her mature look in this drama really show her beauty, her actual beauty.
here is my honest confession so please don't hate me Yu Shuxin fan. To be honest, i never found Yu Shuxin attractive since i don't like cutesy type but after watching My Journey to You, damn i really found her attractive. it's like she has a hidden beauty behind that cutesy persona
I didn't understand? The series isn't even in Japanese or made in Japan lmao
and if you watch the Japanese Dubbed version of the Live Action, all of the Original Japanese Voice Actors are actually voiced the live action of their respective characters
K-Drama 
Cultivator? maybe
Guardian? properly