Chuu Bra!!

Yayoi Hayama entered Seinan Private Middle School with top grades, but on her first day, she took an unfortunate fall that exposed her flashy underwear to her classmates. Miko Jingūji and Haruka Shiraishi, suspecting Yayoi of engaging in compensated dating, approached her to find out the truth. The three accidentally tumbled down the stairs, during which time Yayoi stared intently at the underwear peeking out from under their skirts, even offering advice to Haruka afterward. They eventually realized that Yayoi was just a somewhat eccentric girl with a deep passion for lingerie. Driven by an urge to intervene whenever she saw someone wearing ill-fitting underwear, Yayoi decided to establish an "Underwear Club" dedicated to researching the correct ways to choose and wear lingerie. Although it initially failed due to various issues, with help from Haruka, Miko, Komachi, and teacher Mizuno, she successfully founded a new "Underwear Appreciation Society." In this story, Yayoi, the protagonist with a strong obsession for lingerie, strives tirelessly to teach everyone about the importance of wearing underwear correctly...