My name is Kakuga Satsu. This year, I turned 18 years old. Today I am having my wedding ceremony because Akuji's grandfather, Ippatsu, requested. Sat-chan was just about to marry Akuji when the Momoyama clan interrupted the ceremony. She would fight back with her favorite rocket launcher, but unexpectedly the enemy was strong, named "The First Night". Humiliated with the situation, Sat-chan will dress up with the "nude apron", trying to make Akuji happy. Her body, which has been untouched, will be caressed by Akuji,