Houshi Saito is 25-year-old "virgin" whose soon-to-be-wife ditched him for another man on their wedding day. But one day, a beautiful girl named Momoka Kiyozumi comes to him and confesses that she fell in love with him at first sight on that would-be wedding day. With a world filled with women and bountiful sex open in front of him, Houshi's virgin days are numbered!