Maou-sama, Re Re Revenge!

Synopsis:

The girl named Mada Ooma, who attends middle school, was a Demon Lord during her past existence. There is only one feeling of regret that haunts her. This regret stems from her inability to express her love to Riri, her servant, whom she cherished in her former life. A love that seemed impossible to realize. . . or at least that was her belief until Riri unexpectedly appeared before her in her current life. . . ! ? A cheerful and innocent romantic comedy intertwining past experiences with current ones, featuring a former Demon Lord being led on by the one she adores!