can someone say me what happens next?

Sorry i don't know what happens imma just wait with you

SPOILER FOR THE END
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The sister puts him back in the novel as himself, the ML recognizes him and they live happily ever after

and what happens to mujin?

Mujin accepts Jaewoo X Hyeonjin. The two live happily ever after and Mujin stops bothering them

ohhh thank god

and thank you for telling me

Thanks for spoiling but can we get rid of Hyeonjin’s dad just to be sure? That man has to go really (╬￣皿￣)凸

Thanks

Mujin and Hyeonjin became friends after Jaewoo's passing since they get together to drink and talk about him