The Monster Manor, Cursed by Blood

(from ebookjapan):
Kei has lost his fiancée, Misa, in an accident. When he sees blood, he cannot stop shaking, and the accident was caused by a seizure from seeing blood while he was driving. Strange memories from his childhood come to the surface in his mind.... A young brother running away in an unusually spacious house. A three-fingered woman locks him up in iron bars and treats him like a dog.... What is the secret of the elder brother sealed behind the memories...?