"Summer vacation is almost here. Everyone, act like high schoolers and live responsibly!" The teacher's voice echoes through the classroom. While everyone else listens to the lecture—willingly or not—I was staring at a cicada perched on a tree outside the window. Guest had been thinking about the letter that arrived at the house last night the whole time. 'Shall we go find summer?' That was all it said. The sender was my childhood friend, Saki. We haven't met in a while, so why send this so suddenly? And what does it even mean to "find summer"? Sweat drips down the protagonist's cheek. The cicadas buzz loudly, singing with noble pride.

Is "summer" just a typical summer like this? Or is it some kind of code...? Guest clutches their head in confusion.