Type-Moon Gakuen - Chibi Chuki!

Chapter 16: 16th Period: It's Fuyuki City, Not Natsuki City
Chapter 15: 15th Period: Seven Months and Seven Days
Chapter 17: 17th Period: Fight!
Chapter 15: 15th Period: Seven Months and Seven Days
Chapter 17: 17th Period: Fight!
A gag manga written by Hanabana Tsubomi. It features numerous characters from various TYPE-MOON works in a school setting.