Takeshi Sasano, a university student and tennis club member, sports a sharp mohawk and a single piercing in his right ear. Affectionately dubbed "Sasa Pie" by peers, his gregarious nature drives him to organize lively gatherings—from beach outings to late-night parties—drawing clubmates and friends into his orbit. Within the story, he thrives as a social catalyst, effortlessly bridging connections and energizing group dynamics through his approachable, proactive charm.