A doujin (non-H) by NTYPE based on the relationship between Mikoto and Touma.

It isn't sure where in the timeline this story could take place, but being a Doujin it really doesn't matter. Many place it just after the very first Mikoto arc of the Index animation, whereas other place it after un-animated novels.

Originally I posted the links of the first 2 volumes at the To Aru Majutsu no Index thread... but seeing the possible nature of un-animated arcs, plus the fact that this takes place during the Index timeline, I decided to not post it on the To Aru Kagaku no Railgun thread.

Volume 1

Volume 2

*NEW* Volume 3

Scanlated by V-Scans