By a chance encounter, a brother and sister begin choking each other, gradually consumed by a forbidden love. Enraptured by each other's body heat and fluids, they lose their words yet connect more deeply. "Onii-chan... I couldn't die... I'm still alive... So please... don't bury me..." "See... my shit and piss are warm, right?" "Should I make you cum in my mouth like always? Or... should I sit on your face? But... I can't move my body... I can't speak... Onii-chan... I'm leaking shit... What should I do..." Their relationship deepens within love, obsession, and despair. Touching each other's bodies, they crave one another on the verge of collapse. Amidst their anguish and physical urges, conflicting emotions intertwine. In this unsettling atmosphere, the two become bound together more tightly than ever.