Satou Kazuma, shut-in NEET, died trying to save a girl. As a reward, he is given the chance for a second life on a parallel world by a rude goddess named Aqua, along with one skill and an item of his choice. Insulted many times by the goddess, he chose her as his companion in an act of spite. Thus, his journey begins to defeat the Witch, aided by an unusual skill: Return By Death.

In a a place were devils, angels and fallen wage war for supremacy what will happen when the person who is able to purify god and exorcise the devil arrives in their world. (Note: Touma may be a bit OOC and also there will not a be a harem maybe a paring but I'm not sure)

What if Touma were to replace Frisk as the savior of the underground? Will he get back home and save everyone in the underground, will he show that humans can't be all bad and show hope for everyone. Will he save this little girl from herself before this all over? Read and find out. ToumaxTorielx(Later)harem. Rated T for safeted.

A 'What If' story with Mikoto and Touma as childhood friends. A small ripple that results in big changes, resulting in a story that merges both Railgun and Index stories. UPDATE: Research Done. Index Arc concluding soon!