until my husband's little sister is ready for me... Mochizuki Ayaka

He was the younger brother of a pervert who had come to his sister's house after a long time. When her sister was still single, she had sex many times and treated her as a meat stool. My brother, who had no history of life, tried to kill his sister while he was sleeping, but instead of his brother-in-law who happened to be on a business trip without getting lost and apologized for his sister's richness and went out as many times as he wanted.