Which cartoon character is this red-haired boy?

Starry sky ☆ Sky —— Taking Xingyue College, which studies celestial related professional knowledge, as the story stage, it describes the love story of the heroine, as the only female student in the school, intertwined with 12 charming boys. It consists of 12 CD Pisces and four games, also called "Planetarium CD&; The game "-starry sky ☆ sky". 12 characters each have a unique personality of 12 constellations. This planned work attracted a wide range of fans and was finally announced to be animated. As the only female in the school, the heroine spends a happy college life with them-which constellation do you like? The love story guided by the constellation is about to begin!