In love and love, technology wins everything. Let's teach you the ultimate technology "love engineering" that captivates women! Watanabe, a 26-year-old patent attorney, was shocked to be cheated on by his doting lover, Maiko, and drowned in alcohol at the BAR, closing in the reality that everything was not going well. Then, suddenly, Nagasawa, whom he met at work before, appears and witnesses the scene where he instantly captivates a beautiful woman he meets for the first time! As Watanabe chases after him, Nagasawa tells him of the existence of the ultimate technology to be popular.