Here is the glossary. The glossary explains the powers which Kenichi got from the Incubus further than the chapters told so far. The author introduce this glossary normally around arc 4 but I thought it would help new reader with the powers and other readers who are interested how it works. There are still some information i left away because they didn´t appear yet and I will add them when the author introduce it in the story.
For those who didn´t read it yet I will first finish the 6 special chapters which play around Arc 2 and then I will continue with Arc 3. Little spoiler: 3 new heroines will be introduced one of them already appeared since the beginning.
PS: The author also did a character introduction. I will translate it when I have time it only contains some further information about a person.