I saw somewhere that there might be a chance of munyeong and sangtae are siblings???
cos the both like child books
they both are talented at art, one is writing kids books and one is good at drawing
then the drawing on hospital's wall has a castle in it, is that part of his childhood memory???
Munyeong's "mum" said 'let me take care of my own kid' what does that even mean?
Anyone has this theory too? or is it just all in my mind