

Trying to remember a manga I had read a few years ago. A little spotty on the details, but - MC is the first born boy of his family, but is missing a hand/arm and is a family disappointment and closed off/ignored. A girl comes to live with him as his maid and/or fiance and lifts him up and heals him emotionally.
Not it, but thank your for the thought! I don’t recall if they were born with only one arm or if happened later.