The title itself is a narrative engine. Sagashimono translates to "lost article" or "something being searched for." In the context of a summer story, this usually implies a physical MacGuffin—a lost time capsule, a missing cat, a forgotten token of love.
When the characters look up at the exploding lights, they are not just seeing a show; they are seeing a reflection of their own summer. The "What We Found" in that moment is the courage to appreciate the beauty of the present, without Natsu no Sagashimono -What We Found That Summer
Kind and gentle, though she acts like a "hot young thing" in her 30s and is strangely hesitant to leave her house. The title itself is a narrative engine