The manga centers on a set of twins with an older brother and younger sister. The twins were born with a set of odd matching birthmarks on their sides. After their mother abandoned them their stepfather sold them off to a freak show. The story tells what becomes of the twins afterward.
Tomino the Damned is currently publishing . It is also Known as: トミノの地獄, Tomino's Hell
Top Manga Like Tomino no Jigoku [2022 List]
3. Shoujo Tsubaki

The basic plot is that an orphan girl named Midori is taken in by a traveling freak show. The freak show includes such unsavory characters as a mummyman, a snake woman, and a drooling man with no limbs. The owner of the freak show, the eponymous Mr. Arashi, is a strict man who allows his freaks very little freedom or joy in life. He is especially cruel to Midori, our heroine. Midori works, not as a freak since she is normal, but as a sort of caretaker of the freaks.
Mr. Arashi's Amazing Freak Show is finished and has 1 Volumes and 8 Chapters. It is also Known as: 少女椿, Midori, Camelia Girl
2. Tengoku ni Musubu Koi

A tale of conjoined siblings: war, friends turned enemies, and life with a traveling circus.
Tengoku ni Musubu Koi is finished and has 1 Volumes and null Chapters. It is also Known as: 天国に結ぶ恋, Love That Connects To Heaven, Conjoined Paradise
1. Goshiki no Fune

During a war they can't see, a family makes a living by running a freak show. They add a monster named Gudan, who can guess the future.
Goshiki no Fune is finished and has 1 Volumes and 8 Chapters. It is also Known as: 五色の舟, Five-color Boat