Osamu Funada, a close male friend of the protagonist, exhibits a bold, persistent demeanor marked by recurring attempts to observe female peers in vulnerable scenarios like changing clothes. These actions frequently provoke physical retaliation from Shino Ebizuka, Konami Hatano’s protective friend, yet his tenacity drives him to persistently circumvent such obstacles. His narrative role centers on directly interrogating the protagonist about unresolved romantic feelings, pushing him to pursue a relationship before their final high school summer concludes. Interactions with Shino fuel a recurring comedic dynamic, emphasizing clashes between his opportunistic behavior and her protective instincts. Nicknamed “Funamushi”—a reference to a resilient marine isopod—his persona embodies opportunistic persistence. His conduct sharpens contrasts within the group’s social dynamics, though no deeper backstory or character evolution is explored. Relationships or developments in extended media remain undocumented.