[Juubako no Katasumi] Ishukan-sensei Ka ~Shokushu Gyakushuu Hen~ [SCANMTL]

Ishukan-sensei, an elf-like demi-human teacher with a masochistic streak, is caught in a tentacle creature’s relentless embrace as sweat, tangled bedding, and desperate pleas turn the encounter into a feverish contest between surrender and resistance. The black-and-white pages escalate through intimate teasing, invasive penetration, and frantic cries, blurring pain, pleasure, and the creature’s rough tenderness until Ishukan’s willing submission feels dangerously complete. A closing character note frames the strange bond through a seductive-bottom dynamic: Ishukan seeks interspecies attack, teaches demi-human students to exploit their weaknesses, and then watches them leave to become independent.