Unable to hide the excited erection. My big-breasted girlfriend, Marina Ikeda, has had her breasts taken away by a muscular penis. (DASS-557)

Although she had a boyfriend, Marina had never known how good a muscular man's large penis was. She also didn't know the advantages of a man's erect penis. The two became aroused by each other's erections, exchanging pleasantries as their bodies intertwined. An uncontrollable excitement stimulated them, and although she knew it wasn't good for her boyfriend, her sexual desire was uncontrollable, and she greedily indulged in the pleasure.