The Tale of Outcasts: The Flame Knight

The young girl Wisteria has sacrificed her eyesight in order to compensate for entering into a contract to live with the immortal demon Malbus. During a journey to find Malbus' former breathren, they come across a forest garden: the place where Malbus' former contractant Ofelia devoted her life to researching the "Rose of Hope". She once said, "After I've died, I want you to see the rose bloom with your own eyes." But the garden she left behind has been mercilessly laid to waste, and there's nothing left to see...? So in order to fulfill Malbus' old contract, they proceed deeper into the forest to confront the source of the destruction... Source: Shogakukan