Tatsuya turns 20 and gains powers from an alien in form of magic which allows to change his form to a lustful body which attracts men and needs men's semen to change back to his original form
He does it the first time with his friend kentarou and it felt good so agrees to do it with others
He then encounters someone whose brother, rei, has same symptoms. Will rei help Tatsuya in any way?
Warning there is a gang bang and Tatsuya have sex with many people other than kentarou but maybe the ending is actually quite good.
Dotei Yankee Magicus