The first floor of Cafe Leblanc, 'Shibuya Crossing', immediately immerses you in the crowd mechanics. You'll encounter 'Crowd Blocks' that prevent movement and 'Traffic Lights' that change their state, allowing or blocking passage. Your goal is to observe the traffic light patterns and move through the crossing when the path is clear. Some F.O.E.s, like 'Street Thugs', will only appear or become aggressive when the crowd thins out, so timing your movements is crucial.
You'll also encounter your first 'Time Limit' puzzles. These usually involve reaching a specific point on the map or activating a switch within a certain number of turns. Failing to do so might reset the puzzle or trigger an F.O.E. encounter. Mark the traffic light patterns and time limit triggers on your map. There are also 'Hidden Passages' that only open when specific crowd conditions are met or when a hidden switch is pressed. Keep an eye out for 'Lost Wallets' and 'Dropped Phones', which are collectibles that provide Yen and sometimes unique items. Proceed to the next floor once you've navigated the bustling streets and completed the initial time-based challenges.