[Ariana], who works as a secretary to the 3rd Knight Order in the royal capital, is a succubus.Her boss, the Commander of the Third Knight Order [Mebert], is also a serious and honest hero of the country!... but in my head, "the delusion of having sex with Ariana" is fully open.And Ariana, her succubus, could "see" it with her ability... For Ariana, Mobert's delusion is a delicious meal, one day spentShe gets involved in a big incident -. Can the stubborn knight commander and his lewd girlfriend find her happiness!?