Yousei Hime Ren  

Elf Princess Rane, Fairy Princess Ren, FPRen, 妖精姫レーン, Yosei Hime Ren

Gou has been searching for the legendary treasure of Salamander, but during his quest he encounters Ren, who is also looking for something - the four treasures of Heart. Mari, a childhood friend of Gou's, becomes frustrated with him chasing after treasures and befriends another fairy named Rin. However, their treasure hunt disrupts a secret project led by Maris father. It turns out that Salamander is not what Gou thought it was at first.