[Schweinchen31] Masochist Boy Training

Izumi looks like any other schoolboy—until the chastity cage, pierced nipples, and a vibrator buzzing away during lunch reveal how deep his secret masochist training runs. When his worried friend Yamato suggests a trip to the infirmary, he stumbles onto something far darker: their teacher has the trembling boy collared, leashed, and bent over, and has no intention of stopping. What begins as furtive bathroom relief spirals into public degradation, with Izumi squirting and squealing like the pig his master insists he truly is.