I have read quite a few harem, ecchi, etc. type mangas and they all have somethig that half decent even if the pplot is nonsensical. This is often the comedy like Rysing x Rydeen or the characters like Rosario to Vampire. This manga howerver has no redeeming features as everything it does has been done before but better by other mangas. Nyan Koi beets it in the cat allergies plotline department. To Love Ru does the ecchi better. Rosar to Vampire does action better.

Story - 2
Its about youkai, so its basically been done to death. However its been really poorly as the action and the plot is unbelievably boring.

Art - 5
The art is mediocre at best and not nice to look at in the slightest.

Character - 1
Terribly cliche and boring with the main character being the most spineless, useless piece of shit ever.

Overall - 2
The comedy is shit, the characters, story and art are shit, so avoid this like the plague it's unbelievably boring.