The last day of the first semester.
Yuusuke, Aki, and Masaki of the fifth grade are challenging mysteries and missions.
· Trace the screen and move the heroes
· You can talk when you hit a person
· If there is something to worry about, examine it with the "magnifying glass" button
· When you do not know how to proceed with the game, try pressing the "hint" button
· When you stop the game halfway, always make "save"