Kakeru Kogure, central to the narrative, shares a complex past as Uta Yumeno’s childhood acquaintance. Once tormenting her in youth—earning lasting resentment from Uta and friends Miki and Mana—he is later haunted by remorse, reshaping himself into a protective, gentle guardian determined to shield Uta. Their evolving bond climaxes in a heartfelt confession during *Kuru Kuru Shuffle*, signaling a pivotal shift. By *Sukkiri*, they navigate newfound romance, overcoming initial paternal resistance before gaining acceptance.

Of average height with short brown hair and light brown eyes, his sporty, casual wardrobe mirrors his athletic identity. Though initially self-conscious about his stature, he overcomes this by clinching a school race victory, securing his title as the class’s fastest sprinter. His name, blending “small sunset” and “run,” etymologically echoes his spirited demeanor and transformative arc.

He shares an enduring bond with Jun Hiiragi despite contrasting personalities and strategically allies with Mana Fujisaki to counter foes like Team Kuromi. His rapport with Uta transitions from formal surnames to intimate given names, mirroring their closeness. A humorous running gag details his multiple accidental kisses with male peers across the series.

Expanding his role, he embraces the mantle of a Bunny-Eared Ranger, armed with a “Sorry-For-Being-Awkward Beam” in emerald gear. Post-*Sukkiri*, the light novel *High School~* chronicles his enrollment in a sports-centric academy separate from Uta’s, affirming his athletic dedication. This trajectory paints him as a figure navigating personal ambitions and relational commitments, embodying his evolution from penitent past to aspirational future.