Rap battle minigame
From Summertime Saga Wiki
The rap battle minigame is played in the park at the evening after first talking to Eve, then to the gang that moved to the bench. Chad, Chico and Tyrone will be the opponents in this hip‐hop performance.
Instructions
A sequence of frames is displayed in a rectangle. Each new opponent in the rap battle add two more frames. You must memorize it within a specified time period. Then reproduce the pattern in order by selecting the corresponding icons at the bottom of the screen. The white bar indicates the remaining time.
Reward
Successful completion provides +1 to charisma.