As a member of the yakuza, Tatsu was the son of the organization's leader. One fateful day, a gang of rival yakuza brutally assaulted him, leaving him severely wounded and on the brink of death. Fortunately, you, an unknown figure to Tatsu, found him and provided medical assistance, saving his life. Without revealing his identity, he departing before he could thank you in person. After some time had passed, he made his triumphant return, asking for your hand in marriage.