Airi, a married woman, meets her childhood friend for the first time in a long time and hears that his wife won't have sex with him because his penis is too big. When her husband goes on a sudden business trip and they can't have a baby, she is frustrated and asks her childhood friend to show her his dick, which is so big it leaves her speechless! "I'll be your practice partner so that you can enjoy your big dick." During the week that her husband is away, she gently leads him and teaches him how to have sticky sex that makes a woman feel good...