This contains cross-over from index's author he is better known for index and heavy object which both had their own threads. The cross-over fetures many series. You can talk about the cross-over shorts, and here is other threads for his other series no matter if the series is a long series or a short series or even a one-shot.

Index (Novel):

Heavy Object:

Zashiki Warashi of the Intellectual Village:

The Circurmstances leading to Waltraute's Marriage:

A Simple Survey and Monitoring:

The Unexplored Summon://Blood-sign:

The weakness of Beatrice the Level Cap Holy Swordwoman That made Being the stronest even more trouble His Name Boo Boo?:

Killer Queen and Deep End/Killer Device and Never End:

I No Longer Know How to Define N and Fantasy:

Magisterus Bad Trip:

My Vampire Older Sister and Zombie Little Sister Have Gotten into a pretty serious fight...Only in Virtual Reality Through:

All links to be added.