In the world of Norse mythology, a human boy falls in love with Waltraute, the fourth Valkyrie sister. He wishes to marry her, but Waltraute gives him an impossible challenge to deter him. Nevertheless, the boy is determined to carry out the dangerous task and to marry Waltraute afterwards. 
(Source: Baka-Tsuki)

A spin-off of the various works of Kamachi Kazuma. One day, Kamijou Touma (A Certain Magical Index) faced yet another misfortune. His toilet was broken and spraying water everywhere. As he was lamenting his misfortune, suddenly he appeared in a strange place along with Index and Misaka. Soon enough, more strange people begin appearing...
 
Includes: 
 
A Certain Magical Index 
Heavy Object 
The Zashiki Warashi of Intellectual Village 
The Circumstances Leading to Waltraute's Marriage 
A Simple Survey 
A Simple Monitoring

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