20th Period 'Observation Diary' / 21st Period 'Sudden Shower' / 22nd Period 'Rock Paper Scissors' / 23rd Period 'Summer Festival'

Following the line of the precedent OVAs (of the same name) This anime goes around the normal lives of some elementary school (5th grade, 2nd class room) kids and their adventures, while turning to teens. Their games, stupid jokes, and the misunderstandings ar...