Where to get this case:
There are 3 men standing in the courtyard of the High School. Talk to them and you get a riddle.
"The giant's wheel, lording over the tree with the most branches, three steps south from the roots. Two more steps east, and there a treasure rests."
FIND THE "GIANT'S WHEEL" & "TREE WITH THE MOST BRANCHES"
Go to the indicated spot in the courtyard and enter Observation Mode.
Examine the Ferris Wheel in the background, examine the nearby tree.
HAND OVER THE TIME CAPSULE, CONFIRM THE TIME CAPSULE'S CONTENTS
Go back to the group and talk to them.
They take out and read a letter. Have a look yourself and ask them, where to find the woman that owns this second time capsule.
You receive a Face Sketch of Goto, the woman.
LOOK FOR GOTO IN CHINATOWN
Go to the marked location in Chinatown and enter Observation Mode.
Examine the woman in the white coat and talk to her.