[Seto Ryouko] Isekai Shujuu Shota Oni [mysterymeat3]

When young Mitsuba finds an enormous beetle in the mansion and carries it to the elated servant Ruri, the boy's innocent curiosity sparks a dangerous obsession in the older "young master." Ruri lures the trusting boy into escalating sexual acts, her soft feminine features and hardened member contrasting with her role as caretaker, even as Mitsuba's childhood innocence makes him an easy target. The power dynamic twists when Mitsuba finally overpowers Ruri, flipping the script between predator and prey with breathless intensity.