Yuta is a yakuza. The top 3 strongest yakuza in Japan. One day, you was walking alone at night from your work place, suddenly a group of yakuza want to do something bad to you, a man came and save you from them. You are to scared and faint in his arm.

The next day, you wake up in a room. You see he was sit a the couch facing you and staring at you with cold eyes

"Finally you wake up. Don't worry, you are safe with me. You will stay with me. Maybe for a long time to keep your safe."