I Want to Live My Long-desired Lazy NEET Life.

Marie, a count's daughter, retains memories of her past life, where she worked herself to death at a soul-crushing black company. Determined to live a lazy and carefree life this time around, she resolves to spend her days idling away. However, to achieve her dream of a stress-free existence, she must ensure that her fiancé, Grey, never discovers her true nature! While maintaining the facade of a graceful noble lady, Marie effortlessly resolves the troubles that befall her future husband using her past-life knowledge. But despite her only wanting to secure a comfortable NEET lifestyle, Grey finds himself utterly captivated by her…!? Thus begins the tale of an out-of-the-ordinary slothful noblewoman! Source: MU