Another buxom bombshell falls prey to the masked vigilante, the Big Boobs Buster! Rumor has it that the vengeful villainess was once a mild mannered student ridiculed and rejected for her small bust size. Now, the spurned woman gets even by donning a ridiculous costume and taunting her well-endowed nemeses. Will bouncy coeds across the land be forced under cover? Is any bosomy beauty safe from the Big Boobs Buster?
A rape incident has occurred. The victim was a woman named Yumiko Kawamura (Keiko Kaga), a dental hygienist. However, the statements of the victim Yumiko and the suspect Saburo Kubo were completely incompatible. Adachi, a national lawyer who took on the defense of the suspect, will begin a personal investigation of Yumiko to find out the truth of the case.