Gakuen Utopia Manabi Straight!: Natsu da! Manabi da! Kyouka Gasshuku da!  

Gakuen Utopia Manabi Straight! Episode 6.5, Gakuen Utopia Manabi Straight! OVA, がくえんゆーとぴあ まなびストレート！夏だ! まなびだ! 強化合宿だ!, Gakuen Utopia Manabi Straight! Special

This episode takes place before the actual planning of the School Fair and shows how the girls spend their summer holidays.