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Do you promise to be loved and disturbed by a demon?

"I'll have you take responsibility for making this withered demon become serious."
The true identity of the old manager is an oraora lewd demon!? His energy is sucked until he becomes mushy...
--Haruka, an office worker, is a big fan of the simple but kind Chief Innose who works at the same company!
One day, however, she hears a rumor that her beloved Chief is going to retire due to health problems...?
Haruka sees the Chief's weak voice saying, "No one sees the real me," and she confesses her feelings to him as if to stir him up....
Then, the Chief is moved by Haruka's feelings, and he kisses her like he's devouring her....
The Chief, who was actually a descendant of a demon, quickly regains his vigor and becomes a handsome old man...
There's something that big inside me...!?