A serious and honest wrestler, inspired by Nozuki Nozomi, resolves to compete topless. Meanwhile, another wrestler who proudly flaunts her massive breasts and desires to show them off to everyone also enters the ring! Though their motivations differ, once they step into the ring, both must fight as topless fighters. The topless match, held three times in the past, was an unconventional bout where competitors fought completely bare-chested, wearing only a T-back bikini bottom. Initially perceived as an erotic spectacle, it soon proved to be a legitimate, intense competition—victory here often served as a springboard to major tournaments and high-profile matches. However, some fighters mocked those who participated, viewing them through a biased lens, while others struggled with shame and discomfort over fighting exposed. Now, a new rule is introduced: "Any fighter who loses a topless match must continue fighting topless in all future bouts." This places Koushiba Ami under severe disadvantage, forcing her to face opponents in swimsuits while she remains bare-chested. Meanwhile, Nozuki Nozomi suffers an injury, missing the rookie tournament and tragically debuting in a topless match instead—bringing attention to the injustice of forcing women to fight topless simply for having large breasts. Now, the fourth topless fight is announced. Akane Mizusaki declares her participation, eager to proudly display her massive tits in battle. However, due to the shortage of big-breasted wrestlers, the spotlight falls on Haruka Momoi, a rookie who entered wrestling idolizing Nozuki. Though initially reluctant to fight topless, she decides to follow in Nozuki's footsteps and embrace the same hardship. Thus, the clash between a wrestler seeking exposure and one driven by sincerity finally begins. Both possess large busts, yet stand in stark contrast. Who will claim victory? And will they, like past topless fighters, seize future glory—or be labeled exhibitionists, forced to endure humiliation and shame?