TV-Series
Description
Kō Yukina is a main character in the Sekai Ichi Hatsukoi series. He is 21 years old, born on September 6, with blood type A, and stands 186 centimeters tall. He works as a clerk in charge of the shōjo manga section at a bookstore called Marimo Books. He has light brown hair and brown eyes, and wears multiple ear piercings, with four on his left ear and one on his right. Described as handsome like a prince, he is extremely popular among women. He loves shōjo manga, which influences him to create flashy and girlish-themed displays at the bookstore. His hobbies include drawing, reading, and visiting art exhibitions. His favorite foods are anything, and he has no particular least favorite foods. His strengths are being forward-facing and optimistic, while his weakness is being quite obstinate.

His personality is passionate and devoted. He is willing to fight to make Kisa understand that what they feel for each other is real. He absolutely hates the idea of Kisa having a possible attraction towards anyone else, sometimes showing a jealous side as he loves him dearly. He is dedicated and determined in pursuing his relationship with Shouta Kisa. He is also noted for being stubborn in his own way.

His key relationship is with Shouta Kisa, the editor of his favorite manga works. He had been aware of Kisa coming to the bookstore to watch him, but when he discovered that Kisa was the editor behind all of his favorite works, he began to develop feelings for him. Their relationship develops throughout the series as Yukina works to break through Kisa's emotional walls and help him understand that he is capable of falling in love.

In the story, Yukina is one of the three central couples in the series, representing the pairing of a bookstore employee and a manga editor. His role shows the development of a relationship that begins from admiration and grows into genuine love. His appearance is described as prince-like, which initially attracts Kisa's attention, but his genuine passion for manga and his persistence in pursuing Kisa become the foundation of their relationship.

His notable ability is his skill in creating attractive bookstore displays that draw customers in, influenced by his love of shōjo manga. He also shows remarkable patience and persistence in his pursuit of Kisa, working to overcome Kisa's hesitations and fears about love. Through his relationship, Yukina demonstrates growth in understanding and patience as he learns to navigate Kisa's emotional complexities.