This is how OVA's/Specials should be.Not directly related to the main series in terms of it being a continuation of it's parent series, but knowing the characters beforehand makes it much more enjoyable. This Special was nearly perfect.It did'nt touch any serious theme like it's parent anime did (which was a coming of age story), but solely focused on giving us another look at the characters lives. It's about when the Iwatobi Swim Club members went to Samezuka Academy's school festival and ended up playing a survival game with water guns.Many new and interesting interactions between characters who did'nt talk much in the main series are explored. Overall,its a blast from start to end.