Hiroyuki Sogabe is a male teenage character from the anime Hatsukoi Limited, identifiable by his black eyes, short blue hair cut to ear length, and his typical attire of a gakuran school uniform and glasses. He is introduced as a friend of another character named Kusuda.

Sogabe possesses a personality marked by a tendency toward delusional thinking and a degree of narcissism. His primary motivation throughout the story is his romantic interest in a girl named Nao Chikura. His approach to this affection is initially strategic and self-assured, as he attempts to get closer to Nao with the specific goal of creating a scenario where she might confess her feelings to him.

Despite his confident exterior, Sogabe is prone to insecurity. This vulnerability becomes evident when Nao starts to show interest in another male, Yukito Renjou, who is an artist and a former student from their school. Unable to cope with his feelings of jealousy and inadequacy, Sogabe runs away from home in a moment of emotional distress. This escapade lasts for two days, and he is accompanied by his friends Kusuda and Mamoru.

This runaway incident ultimately becomes the catalyst for the development of his key relationship with Nao. After he and his friends are pursued by Nao and other girls from their school, Sogabe makes a loud, public admission of his true feelings for her. His confession is overheard by Nao, which allows the two of them to clear the air and subsequently grow closer, leading to the formation of their romantic relationship. By the end of the series, a notable change in his character is marked by a physical transformation: he cuts his hair.