The mother's best friend, Ririka, came to visit. While the mother prepared for the drinking party, Koutarou ended up having to keep Ririka company. Her beautiful face, deep cleavage, and slender, supple limbs... Koutarou desperately tried to resist her mature allure, but eventually couldn't hold back and started fantasizing about Ririka. Worse yet, his fully erect penis was seen by Ririka...
