I'll try to sum it up.
Junai-kei has a strong male presence, but no sex. The writing in the corner says "true love corner". Understand? It's the whole "innocent lovers" thing.
Otome-kei is absent of male presence, and there's still no sex. The heroine just goes about her life in perfect innocence. This sort of stuff usually has strong yuri tones. "Yuri corner". See?
Erokawaii-kei has a male presence, and any sexual ramifications or whatnot are acknowledged by the girl herself. Visual novel stuffage. "No ecchi", see? She notes it, unlike the oblivious junai-kei.
Denpa-kei moe, the "MOEEEEEEEEEEE\('A')/" corner. There's little male presence, and sex is never even brought up. "Irrelevant", see? Digi Charat sort of stuff. Slice of life sort of stuff would go in this corner, too, probably.
Denpa is a term used to describe nauseatingly saccharine, hyper-cute bishoujo game theme songs, and denpa-kei moe images are just that: heavily stylized, almost Dadaist depictions of heroines often so decked out in props and costumes that few physical design traits remain. Not overtly sexualized and with little male presence to interfere, these mascot-like characters are the iconic bastions of