The Poe Clan (Flower Troupe, 2018)

Based on "The Poe Clan" by Hagio Moto

Inside the village of Poe a mysterious noble family takes residence with their son Edgar and ill daughter Marybell. Edgar is quickly intrigued by Allan, the heir of a transportation company, who catches his eye by almost running him over with a horse. As the story unfolds a few residents of Poe slowly begin to wonder about the new family...