A group of men attacks a naive, busty girl (a high school girl, office worker, college student, etc.) who has come to the bookstore, molesting her large breasts, thighs, and buttocks! The sudden shock leaves the busty girl disoriented, and she is mercilessly forced into a reversal of manguri! The busty girl, in a state where her panties are fully visible, is humiliated and repeatedly filled with thick semen from multiple penises! Her cute panties are defiled by the sperm of vulgar men! In a state of shock, the busty girl is further penetrated and repeatedly brought to a forced climax! Without question, she is subjected to a relentless, depraved ejaculation!