Muhou Chitai: Kakutou Bishoujo-tachi no Injoku Battle

Hokomine Gakuen (lit., "cockpeak academy") is a correctional school attended by the country's worst students. It was originally founded as a tournament venue for ongoing displays of strength and skill. The winner earns fame and admiration; the loser is mired in shame.

Two beautiful girls, each with a secret in her heart, go breast to breast, hip to hip a pornographic battle royale:

Hibiki Himegami wants to claim the title of Strongest Student for the sake of her deceased father---

Meanwhile, Ayame Fujishiro is in this for the entertainment, a natural born fighter who (thinks she) can stay calm in any situation---

Prides will fall, hips will arch, legs will shudder, shame will out! Personalities will clash. Mischievous students will meddle. At seemingly all costs, rival hotties pursue the title of Strongest... ... In a pornographic battle royale that begins... NOW---

(Source: dlsite)