"Koyuki Otsuka is one of the main characters in the manga ""Hey, Be My Star Boyfriend!"" He is a tall and attractive young man with dark hair and striking blue eyes. Koyuki is known for his charming personality, captivating smile, and his love for music.

Koyuki is a talented musician and plays multiple instruments such as the guitar, piano, and drums. His dream is to become a famous rock star and make music that people all over the world will enjoy.

Despite being a popular and outgoing person, Koyuki is also kind-hearted and humble. He is always willing to help others and believes in treating everyone with respect. Koyuki’s positive attitude and caring personality are some of the traits that make him well-liked among his peers.

In ""Hey, Be My Star Boyfriend!"", Koyuki is the love interest of the protagonist, Yumi. He is deeply in love with her and is willing to do anything to win her heart. Koyuki is known for his romantic gestures, such as writing serenades and performing special songs for Yumi.

In addition to his love for music, Koyuki also enjoys spending time with his friends and family. He is an avid reader and enjoys going on long walks to get inspiration for his music. Koyuki’s passion and enthusiasm for life are contagious, and he is always looking for ways to improve himself and inspire those around him.

Despite facing obstacles and setbacks, Koyuki never gives up on his dreams and always perseveres. He is a role model for those who aspire to follow their passions and make a difference in the world."