The father secretly held an 18th birthday party for his daughter, which is a girl's coming of age ceremony, but the girl wanted to go out somewhere else, but her father's persuasion made her and along with her lustful friends, she stayed at the party and made a surprise for the father. The daughter's secret was made public because she was not her father's biological child, so she was able to have incest with her father. was a gift she gave her father on her coming-of-age day.