She's being targeted by her fiancé's father... (Matsumoto Riho KSBJ-324)

The son introduced his fiancée, Riho, to his father. The father proposed that if his son could cover the costs of the wedding and honeymoon, he would be allowed to have sex with Riho, and the son agreed. When he drank the tea his father gave him, Riho fell into a deep sleep and unknowingly became a victim of her father's advances. Even worse, the two depraved children enjoyed Riho's body together…