Responses
Don't worry, If I remember correctly he will come back in the next chapter or in the one that follows it (so in 1 or 2 chapters).
And he's the ML so don't worry, he will be part of the plot.
The novel cover:
https://img.ridicdn.net/cover/945054692/xxlarge
The manhwa cover: https://i.pinimg.com/originals/a6/34/01/a63401b0a5f46454e28874d4f0fea24e.jpg
Am I the only one concerned about Nine aka Brother Thorton? I hope he comes back and actually assists with the plot.