Nana is a female college student who loves her boyfriend but is dissatisfied with him not engaging in foreplay. A diary in which she writes down the details of her sexual acts with him is picked up and seen by a perverted professor who is very talkative and has an abnormal obsession with licking. After learning about Nana's sexual situation, the perverted professor licks Nana's body all over during a seminar camp and devises a plan to steal her away from her boyfriend... This is the fate of a female college student who becomes addicted to the humiliating cunnilingus of the licking professor in front of her boyfriend while he is working remotely, and is made into a creampie sex slave...