Kyoukaisenjou no Limbo

Kyoukaisenjou no Limbo (境界線上のリンボ, lit. "Limbo on the border line") is a manga series by Sakyuu Tottori. It was serialized in Manga Time Kirara.

Plot
Fuu is a girl who was born between elf and human, and because of that she was treated as unwanted. Fuu leaves her hometown, and arrives at a place called "Limbo" - a world where a hybrids like Fuu gather. Day by day, interaction with the other residents let Fuu's heart and feelings grow.