As much as I loved the tv series and how they presented the inner struggles of the characters and their lifestyle in the society this ONA had nothing special to offer for its audience. It's just a simple and funny episode about going to a summer festival , where our characters experience different specific customs ( Courage test, eating takoyaki, watching the fireworks together etc.). If you want to have a good laugh after a awful day this is the perfect choice and i gladly reccomend it. If you are looking for some depth and psychological aspects from the characterslike in the tv series don't bother watching it , it's a waste of time.