If you're looking for manga similar to Magical Antique, you might like these titles.
The story revolves around Chitose Haruki is a high-school student who has had immense misfortune ever since his childhood. He lives with his grandfather and his little sister, Sana, who constantly worries about his well-being more than he himself does. Due to Haruki’s bad luck, Yamabuki Aoi, his childhood friend, often gives him charms of various kinds. Haruki lives a normal (and unfortunate) life, until one day Sana finds a mysterious package delivered to their house. The package contains a deity named Unohana no Sakuya Hime, who claims that Haruki’s bad luck is a form of divine punishment his bloodline inherited. She promises to shield Haruki from it, and starts living with him.
Shio is a high school student. Her parents are abroad on business, so she lives with her older brother, Takaaki. They live a peaceful life, but Shio has a secret.... One day, twin brothers, Ryouhei and Kouhei, and their older brother, Aoi, transfer to her school. All girl students are excited to see their handsome faces. So is Shio, but her first impression towards Ryouhei is very bad. Their school life starts like this.... A while later, Shio decides to hire a home tutor. However, the home tutor is Kei, an older brother of Ryouhei, Kouhei, and Aoi...