The first time they meet, they won’t remember it in the years to come.
They are four and a half years old, and it’s a warm summer afternoon. Sousuke’s parents come to Iwatobi for business, and let the kid go play outside under his grandma’s watchful eye.
There are three children on the playground, two sharing a swing, taking turns at pushing each other or swinging together on one seat. Sousuke eyes them shyly, but doesn’t talk, because they seem to be enjoying themselves without any third parts butting in.
Then, they are together in the sandbox, and when the dark haired boy leaves the sand to play in the near by puddle, the other boy calls after him and rushes to join him quickly, crying ‘Haru-chan, the puddle is dirty!’ but then he laughs, because in his hurry he trips and dives in it, splashing the drops all over their clothes, and they engage in a very lively puddle fight, smearing the mud all over their clothes, hands creating cakes and cookies with wet sand, their laughter ringing in the air. Sousuke takes few steps to join them, because it looks like some amazing fun, and the taller boy even smiles at him and waves, and Sousuke runs few last steps to close the distance. To signal how ready he is to play with them, he throws some sand at them, to add to the mess.
It hits the taller boy in his wide open eyes, and it’s a second till he’s crying and rubbing his small fists at his eyes.
Sousuke’s grandma calms the boy down until his parents arrive, and Sousuke is taken home soon after that, where he gets the biggest scolding of his childhood.