KnR

Koakuma no Riddle (Small Riddle of Evil) is a series of doujin written by the Akuma no Riddle mangaka Minakata Sunao in collaboration with Morishima Akiko. The first series has 7 volumes followed by a prologue and an epilogue, and the second series is still ungoing and has 4 volumes.

Volumes

First series
Vol 1

Compilation of every official pairings kissing.

Vol 2

Focus on Isuke x Haruki (HaruI)

Vol 3

Focus on Suzu x Kouko (SuzuKou)

Vol 4

Compilation of every Focus on Chitaru x Hitsugi (ChitaHitsu)

Vol 5

Focus on Otoya x Shiena (OtoShie)

Vol 6

Focus on Sumireko x Banba (SumiBanba)

Vol 7

Focus on Yuri x Nio (YuriNio)

Vol 0

Prologue about Azuma Mako and Sorami (Tokaku’s aunt and mom)

Epilogue

Focus on all the official pairings after the main series.

Second series

Vol 1

Focus on Room 1 (Tokaku & Haru)

Vol 2

Focus on Room 2 (Isuke & Haruki

Vol 3

Focus on Room 3 (Suzu & Kouko)

Vol 4

Focus on Room 4 (Chitaru & Hitsugi)