My Childhood Friend Was a Villainous Young Master

Marquess's daughter Stella and Duke's son Levi who lives next door. The two, blessed with magical talent, have devoted themselves to magical experiments together since they were seven years old. However, one day, the impact of an experiment causes Stella to remember. That her childhood friend Levi is a character from an otome game she played in her previous life, and is a yandere villain son destined for a bad ending…… Also posted on Kakuyomu.