the character development of sang gu might possibly be one of my favourite things to witness in a kdrama. i went from hate, to pity, to love. i don't think i've been so attached to a character before. i couldn't find myself hating any of the recurring cast, for any of their actions that irritated me briefly were completely justifiable (with the exception of na mu's mother- i understand her concern for her daughter but she was incredibly judgemental and close-minded). na mu's protectiveness of geu ru might be an example. it can appear that she was too judgemental of sang gu, but it makes sense seeing as geu ru is incredibly vulnerable and sang gu's initial plan was to indeed exploit his position as a guardian for financial security, and his occupation did indirectly put geu ru in harm's way.

as for possibly the most important aspect, that being the portrayal of autism, i don't personally have the experience, but my brother sits on the spectrum. i'd say that, as far as i could tell, the traits of geu ru weren't too overstated...it addressed the issue of their pure intentions being perceived as malicious (eg. ep 1 where he follows the nurse to ask where she got the badge) and how many undermine or maybe even overestimate their intelligence, as well as difficulties accepting change, grief etc. as an autistic person. i really hope that more kdramas will give proper representation to autistic people that doesn't necessarily dominate the plot, but is just a feature of the protagonist.

the exploration of things that couldn't be said in words but could be shown in belongings is so intriguing and heartbreaking...i mean, i didn't expect to burst into tears when seeing shoe boxes or punching gloves, but here we are; however, not only are unwritten messages of love to the bereft sent by move to heaven, but so is justice (e.g. episodes 3-4). i did find the abusive boyfriend's acting to be a little bit too stereotypically villainous, like cackling when he was caught etc. though i understand that it was meant to demonstrate his ability to play the victim and switch.

if i absolutely had to make a criticism, i suppose that it would be the very end of the last episode, in which geu ru appears to be enchanted by a girl. there might not be any romantic connection, but the ambiguity of the scene mildly irked me. is she terminally ill? or is she planning to bring an end to her own life? what did the white butterfly symbolise? life? purity? surely, the connotations contrast what she is saying, unless her transition to heaven is symbolised in the butterfly. maybe this is a set-up for season 2 (?) if i was being optimistic.