Not much in the way of a plot here: Arisa comes back to her room to discover Shipon masturbating... with a penis. As one would expect from a hentai doujin, this immediately leads to gratuitous sex.

The sex itself isn't bad, though nothing exceptional either. A little oral, a handjob, some missionary... you know the drill. The artwork does a servicable job of letting you know what's getting stuck where, but the characters are depicted slightly differently from their anime counterparts.

Overall, not a bad work, though short. I'd suggest this mostly for fans of Stellvia who also enjoy futanari works.