監獄姫 ～リトル女王様のＭ男ペット化調教～

‘Femdom,’ a special government-approved facility.
A terrifying place that advocates ‘female supremacy’ and rehabilitates (trains) men under this ideology.
The protagonist, Tomoki Nakano, who was sent to Femdom for theft, kept a low profile to avoid catching the attention of the female guards.
But one day, about a month after he entered the facility, someone noticed him. It was a girl younger than Tomoki and not even a guard - Kikyou.