Eikoku Roman Giga Forest Ivy

Where is your home? The castle you inherited turned out to be a haunted house!? Set in a rundown British castle, this is a heartwarming "home-building" story featuring Oscar, a good-for-nothing painter who "can't even draw!" and Ivy, a little girl with a complicated past who is "as selfish as can be!" (Source: Kadokawa, translated)