The nightly intense caresses melt her innocent body... "I won't go all the way until you say I can. " But the waves of pleasure don't end... After losing her mother, her only living relative, Yuka graduated from music school thanks to the support of a mysterious philanthropist. On the day of her graduation, she's kidnapped by Takaomi, the young leader of the Shido gang. Only then does she learn that the father she never knew was a big shot in the yakuza. Takaomi vows to take care of Yuka for the rest of her life and forces her to live with him with the intention of getting married in the near future. He sweetly presses himself on her at night and dotes on her during the day while also showing her nonchalant kindness. Her fear fades and she ends up falling for him, but one day, she learns of his true self on the job as the young leader of a yakuza group!