Akifumi Kiriyama is a secondary character in the anime. He is a male student in his second year of the plastic arts course at Takebe Gakuen. Kiriyama holds the role of being the best friend to the protagonist, Chisato Murai.

His personality is notably defined by his loud and boisterous nature. In fact, he is characterized as having a very strong voice and is even considered to be the loudest person in the world. Despite this outwardly noisy demeanor, Kiriyama possesses a sharp and perceptive side. He has a great capacity for observation, which allows him to understand situations and the people around him on a deeper level.

This combination of traits informs his primary role in the story as a supportive figure. He is not merely comic relief due to his loudness; his keen observational skills enable him to act strategically. Kiriyama sometimes works behind the scenes, using his understanding of events to help Murai in his romantic pursuits. In this way, his actions are driven by a loyalty to his friend, and he serves as an important ally who contributes to the progression of Murai's love life from a more covert position.