Maybe that's just the part of script and she was supposed to use cold water but she used actually hot water instead. This way she could then talk her way out "oh, I didn't know it was hot!"... But I may be overthinking it too much.
I hope Moo-yi is fine!
What the fuuck!!!!! crazy stalker!!! is she for real?? she started to show her true self... even if it was acting as some comments say, there is some true to it I mean she tried to get him hospitalized by giving him those drinks in previous chapters... what's wrong with her?? ugh I really hate this turn of events, I liked the fluffiness in the early chapters I wish this whole stalker thing would end quickly..
@clarinetto you would also think film sets would modify machines to purposely not make hot drinks (but add things to make it look hot) to limit the risk of having actors burn themselves... or have crazy ass stalkers attacking ppl