This was a great little read, my only complaint really would be why couldn't they have got more chapter's out of this. Maybe some on going more into the past of the two Imari's and one on how Rika got her claws into big Imari. With two loveable central characters, it could have been done. But that's a nitpick as I was greedy to see more.
I did love the dark turn the story took with Rika's arrival. Someone who clearly isn't comfortable with her sexuality, but is clearly in love with Big Imari but doesn't want to lose her. Instead of admitting her feelings of love, she mentally and physically broke down Imari, making her feel ashamed of her sexuality and herself. What a great villain, and cause you fall in love with the two Imari's anytime she get's violent with them, you want to see her get her just deserts. Little Imari get's her moment, and totally destroy's her and win's the day.
Sure the Yuri is tame (not even a kiss), but that doesn't matter when you get a great little Manga like this.