Yuma Rin is a 185 cm 9th grade High school student, he is 16 years old, He is cautious, witty and careful towards girls. He has a strange feeling of competition and jealousy with boys. He has lost his younger sister in an accident and this has become one of the major traumas of his life. He likes to look at the stars. He loves the sky and navy color. He listens to rap music. He has some breathing problems and that's why he often wears a mask. He is handsome and charming.