[Hakuyagen] Ayaki no Uchuu Houshi [Full Color] [EroGPx]

Ayaki, a boy branded with a slave mark on his cheek, spends his days as his master's living exercise equipment — strapped onto a pedal machine, bare soles worked raw by bumpy treads while his arms are pulled aching taut with every stroke. He's kept pedaling through exhaustion, denied release by strict orders, and force-fed a bottle of 'condensed semen' while his owner lounges nearby enjoying dessert. The cruelest test comes when this trembling, slender boy is left soaked in the rain, bound to the machine with a name tag on his bound cock and a sign around his neck announcing anyone may rape him — just as his master hands the reins to a pair of eager strangers.