[Nemurineko (miniru)] Secret Textbook (Sennen Sensou Aigis) [cotrans.touhou.ai]

A bespectacled beauty from Millennium War Aigis takes a flustered young man firmly in hand, peeling off her clothes with the declaration that preliminaries must come first so they can truly accept each other. Her confident instruction melts into breathless surrender as he takes her from behind, driving her from teasing composure to begging for everything he pours deep inside her. A secret lesson where the textbook stays closed and the real education unfolds on the bed.