Houkago Nana-fushigi (放課後７不思議 or „After School Seven Wonders”) is another horror-themed card game by Oishii Tanishi. There is a rumour among the students called the „Seven Wonders”. Was your behaviour bad at the end of the semester? You have been chosen for an interesting cleaning duty: „All assigned members shall be spirited away” or „You shall be taken by the strangeness of the Seven Wonders”, and so on. Will you be able to execute your task? If you sneak away in the middle of it, it will be already too late, and you will become trapped in the school building!