[Machine Translation] Eiji and his friends, who are always getting into mischief, were misled by a powerful enemy of elementary school students! Eiji and Hitomi are forced to eat a cheesecake made of paper mache, and a watermelon made of balloons bursts into a series of freezing pranks! Eiji and Hitomi go for a swim in the sea, and what about their love? But there is a big incident... Join forces and defeat the bad adults! Newly written by Tsubasa Bunko, the 17th volume of the Bokura series! From elementary school upper grade.