This movie is a dark realistic depiction of the relationship between older and younger siblings. The director did an amazing job bring out the realism. Kubota Masataka did an amazing job as always but he did not outshine the cast in this one. They all did a great job with their roles. The powerful message this movie delivers is that envy can be hideous and that family/siblings are the only people who can really make you mad like no other. They know what buttons to press and how to bring out the worst in you. But does that make your siblings your worst enemy or are they irreplaceable family? I'll let you watch the movie and find out. :D