A busty, lewd older sister experiences a suffocating orgasm as her younger brother's massive penis presses against her cervix. (Fujiko Mio ROYD-138)

My newly acquainted stepsister was supposed to be someone I could talk to about school and relationships, building a good sibling relationship...!? One day, my girlfriend dumped me because my penis was too big, causing us to fail at sex. Feeling depressed, my stepsister comforted me and told me not to worry about never being able to have sex. She said she would help me solve the problem. Then, after seeing a penis even bigger than she had imagined, my stepsister couldn't resist and suddenly started giving me oral sex! Faced with that enormous penis, her private parts became aroused, and she couldn't hold back any longer!