As a good otaku friend. I (Reo Ota) have feelings for one of such friends, "Ku-chan (Kumiko Tada)". However, in my absence, Ku-chan's frivolous words become a trigger, and she and her other friends enter into erotic development. I can't stand it and spit it out. Their desire to be liberated from their secrets. And sex! Sex! Sex! Ku-chan continues to respond to their runaway sexual desires. Without his knowledge, she falls into sex...