A strong arm catches Nanako just before she falls, followed by a passionate kiss. "No, I can't reject such..." Nanako is utterly in love with her boyfriend, Kotetsu, the charismatic and brilliant CEO. As she anticipates the proposal, her dream turns into a nightmare by getting kidnapped. Kotetsu arrives in a desperate, last-minute rescue, but he takes a blade to the back. The small space of the cut reveals a terrifying secret: a tattoo of a tiger. "I'm actually a yakuza." The true story of a dedicated yakuza's unexpected, all-consuming love.