Love Straddle

How does a man know the rules of relationships with women?
He may be a high achieving engineer student, but his relationships with women fail to understand them.
Beautiful biology student Vicki is his obsession but she wont pass on "free love" the way Liverpool girl Barbara will. To be invulnerable to females he cant predict, he invests in love with the two girls as a straddle in the commodity. But with each girl behaving nothing like he predicts, how can it result in anything but tragic consequences?