Hikari no Kuni no Fellmere

In the country of Neuenfeld there is a fairytale that everyone knows, the story of a butterfly called Fellmere. When the sky was covered by clouds and darkness, birds took off in search of light, but could not penetrate the clouds and fell to the ground. Only the butterfly could reach the light. The protagonist, Noel Strasse, is the next head of an important household in Neuenfeld. He owns many slave 'dolls' who no longer have human rights, though he tries to treat them well. One day, a doll named Sefia runs away.