Hiroyuki, born on April 23, 1982, in Ishikawa Prefecture, is a Japanese manga artist whose career spans both original creations and the adaptation of his work into anime. After graduating from Tokyo Animator College, he initially worked in animation before transitioning to manga, gaining early experience through dojinshi, particularly works based on visual novels like Tsukihime and Fate/stay night. His professional debut came with the four-panel manga Dōjin Work, which ran from 2004 to 2007 and marked his first work to be adapted into an anime television series.

Hiroyuki is best known for creating the manga series Mangaka-san to Assistant-san to, which was serialized from 2008 to 2012, followed by a sequel series in 2013. This comedy about a manga creator and his assistants was adapted into a television anime that aired in 2014. His next major work, the slapstick romantic comedy Aho Girl, was serialized from 2012 to 2017, further establishing his reputation for comedic storytelling.

His most recent notable work is Kanojo mo Kanojo, known in English as Girlfriend, Girlfriend. The series began serialization in Weekly Shōnen Magazine in 2020 and concluded in May 2023, spanning 16 volumes. The romantic comedy, centered on a high school boy who attempts to maintain a relationship with two girlfriends simultaneously, was adapted into an anime that premiered in 2021, aligning with the user's reference.

Recurring themes across Hiroyuki's work include comedic takes on relationships, often with a focus on romantic entanglements and the dynamics between characters in absurd or exaggerated situations. His artistic identity is also tied to his dojinshi circle name, Jishō Seihunha (Self-Proclaimed Pure Faction), and his self-caricature is a simple figure known as "Pants-kun," who frequently appears in his manga extras and has a cameo in the anime adaptation of Dōjin Work.

He is the younger brother of manga artist Kouji Megumi, and has cited Ken Akamatsu as a major influence, noting a shared approach to including comedic elements and fan service in his work. Hiroyuki's industry significance lies in his consistent output of successful comedy manga that frequently transition to anime, demonstrating a steady career within the realm of four-panel and romantic comedy genres in major publications.