risa = feeling, maiko = sight & smell, fumi = hearing, altogether = taste
they completed the five senses :D
i find it funny when risa tried to make maiko jealous but she was just like "jokes on you i'm into that shit"
all the smut aside, this actually has a a nice polyam plotline and i love it.
and as for someone who prefers butts than boobies, THIS IS HEAVEN