Cunny is a contraction of the word "cute" and "funny". It is also a corruption of the slang word "cunt" which pertains to female genitalia and thus associated with activities involving the aforementioned.
It is usually used to indicate that the speaker experiences excitement (sometimes arousal)...
knew it, the time that the previous chapter showed that figure, it was to similar and I had to re-read the whole manga to find that part and also need to confirm that the mc's childhood friend was akane
I'm not sure but please don't make the lyricist go to the dark side like amduscias because I get the feeling it would be between Iruma's class vs dark side if ever this happens in the near future