After the conversation, you can explore the Fortuna Entertainment office. Examine the nearby vending machine to get a tutorial about food and drinks. There are also shelves near the desk where you can put trophies.
When ready, enter the blue door to trigger yet another cutscene. Here you’ll learn about the Bloom Palace and Carnage Unity. Once done, talk to everyone then leave the area. Back in the office, talk to Maiko to trigger another cutscene. After the scene, you have to leave the office to be taken to the city map.
From here, you can choose where you want to go. There's a request called "Lucky Spot 1" from a girl in Daitama so you can go there and accept it. You need to go to Shibuya next. You’ll receive a topic from Tsubasa and Maiko. Read them in your Gamepad. Once done, you’ll receive another topic from Tiki. You can check out the various shops here. If you have the money, I suggest getting one or two accessories from Jewelry Carabia and maybe some consumable items from HeeHo Mart.
Head to the studio for a cutscene. You’ll eventually meet Kiria and you’ll receive a ticket to her live concert. After the conversation, read the topic from Tsubasa. You’ll also receive new casual clothes as costumes. This will unlock the Wardrobe menu. In this menu, you can change your characters' costumes.
To continue with the story, meet up with Tsubasa in front of the lesson studio in Shibuya. Make sure you have checked out the shops and make the necessary preparations since you’ll be fighting in a new idolasphere.
After the long scene, make your last minute preparations. When ready, go upstairs behind Tsubasa in Shibuya 106 to enter the idolasphere.