Domina no Do/YMMV

Double Standard: Domina No Do lives and breathes this trope. If Takeshi was a woman this manga wouldn't have passed from the first chapter alone.
High Octane Nightmare Fuel: Ayako is a cute, shy, pigtailed Meganekko who would normally be a member of a love triangle, or perhaps a heroine in a shoujo manga. In reality, she's a complete psychopath who makes Takeshi eat parts of her body (she put blood in the sausages she made for him, spit in the cookies she made, and filled the riceballs with her shaved pubic hair), drink his own urine, and wear a diaper so she doesn't have to untie him from the secret bedroom / shrine to him she has him chained to. Sleep tight!