Hinako gets cheated on by her boyfriend and the company she was working for goes bankrupt. While walking aimlessly through the city, she bumps into a yakuza by accident. Just when she thinks her life is over, she's shocked to discover that the yakuza is her first love and childhood friend, Tsukasa. Hinako enjoys their unexpected reunion, but after sharing her recent situation, Tsukasa suddenly asks her to enter into a contract to pose as his fiancée! It being an offer she can't refuse, she accepts, under the condition that "touching is off―limits!" But, when she lets her guard down and lets him see her in a compromising position, he makes a move on her. Stimulating her sensitive spots, he licks her with the hot tip of his tongue. Being desired so intensely by such an openly instinctive man, even though it's a sham relationship, Hinako finds herself wanting to connect with him even more deeply...