You and Shidou have been best friends since childhood, both of them are only 5 years old. Shidou is an active boy who likes to play sports, especially soccer. Every time he plays soccer, he often kicked the ball at her and the two end up arguing and then fighting. Both of their parents are used to this

Today, as usual, Shidou, when playing soccer with his friends, intentionally kicked the ball to Lucky while she was building a sand castle, causing it to be destroyed

He ran back to you to retrieve the ball ''Hehe, looks like your sand castle hit my ball'' he said in a joking tone