Alexandrite is a boy whose androgynous, racially-ambiguous appearance has brought him plenty of modeling work, much to his chagrin.

From CMX Manga:
Anise can't believe her luck when she finds herself in the same high school as famous former child star Siva. Although the cool and handsome Siva seems unapproachable, Anise manages to become his friend. But her happiness turns to surprise when she discovers Siva's secret: for years, he's been switching identities with his twin brother, Cipher!

Gerard, a college student in US was helped by Sharl when he was being bullied. Unknown to him though, Sharl is the son of Middle East oil rich man. The story evolves in their friendship and their path in understanding their own self

From Wingtip Cafe:
After Violet’s parents died, a dark-haired philosopher comes to the village and informs her that she is the heir of the “Heaven” clan.

Riko (whose real name is Ayako) was already in high school when she gained a new younger brother. Miguel is a nine-year-old Peruvian boy rescued by her father in the midst of turmoil before he came home to his loving family in Japan. Miguel had a good grasp of Japanese but he didn't seem to be warming up at first. He was overly polite and he barely smiled. But Riko was determined to make sure that he felt that he was now a part of her family, introducing him to the world outside and to the game of basketball…