Felicia Rabius, the sixth daughter of the Marquess Rabius family, was reincarnated into this other world while retaining memories of her previous life in Japan. Such a Felicia left the mansion at the same time her father's recently married "Fourth Wife" arrived. Her new place of residence is a mansion standing quietly in the forest at the frontier of the territory. However, no matter how long she waits, none of the servants who were supposed to come ever show up!? That's right, Felicia was "forgotten" by the Marquess family――. However, this mansion is surrounded by mysterious things, such as Magic Tools she has never seen before and an abnormally overgrown medicinal herb field. There, despite being only seven years old, Felicia decided to start a carefree life living alone.