This may be quite disturbing towards the last scene but I think the girl just got a taste of her own medicine. Sometimes people tend to make fun of someone without realizing that it may be too much for them. Mika here seems to be insensitive as she was uber naughty with the neighbor who was eager to help with her predicament. The over-the-top naughtiness compelled the neighbor to do something shocking , which had Mika in tears. May this serve a lesson, too, for everyone. Definitely a must-watch!