Below are the steps on how to increase your intelligence in Summertime Saga (This is required if you are taking Ms. Okita''s quest). This article assumes you already fixed your computer. Otherwise, go to Mall and buy the computer parts to repair it.
Go to your room and click your computer (btw, your computer password is cookies)
Click the "Maze Runner" icon
Now play the game (For android, all you need is to tap the screen)
For every monsters appeared, click the corresponding skill (See the encircled on attached images)