"Kegareboshi"—an idol story of succumbing to ultimate pleasure—by artist Kuuki Sato is getting an anime adaptation! Arisa joins the agency Seven Arts as a rookie idol, only to be immediately cast in the "Underground Idol Lewd Sports Festival." Ibuki, initially unaware of the situation, puts her own body on the line to protect her junior, Arisa, but finds herself humiliated across various events. Koharu, a fellow idol, mocks Ibuki while engaging in sexual acts with Kurozuka—and eventually discovers the shocking truth about the Arisa whom Ibuki had risked so much to protect...! [Cast] Ibuki Asaba: Yu Hazumi / Koharu Shirasaki: Saya Kagetsu / Arisa Kurozuka: Airu Kurose Asumi Tamai: Mahiro Miyaoka / Ayaka Okazawa: Hinata Utsumi