Ryo Sugiura is an unfortunate guy with a problem; whenever he gets turned on or thinks of perverted things he turns into a giant monster. Feeling alone and desperate for help he calls Telephone Communication Madonna. 

Rumi's met a lot of guys through her job, and it's probably fair to assume that most of them could be said to have some sort of problem, but a man who literally turns into a beast when he gets turned on may be outside of this perky call girl's field of expertise. Still, a little challenge every now and again stimulates the mind and makes life so much more interesting, so she's willing to give it a shot.<br><br>
(Source: AniDB)