Excellent work on the game! Natural characterization, superb visuals, and especially an excellent user interface! The social media and camera systems are very impressive, and it's clear that a ton of work and heart was put into this. I really like the UI transition when the player takes the Elevator, it's so good. And you've snuck in some good tutorials for various systems which no doubt will be used later in the game.
Some small points of feedback:
* Scanning a QR code is very difficult, primarily I think because the player needs to drag around two sliders rather than dragging a box on the image itself.
* I missed the entire social media section before visiting Sara at the coffee shop and felt bad that I didn't accept her friend request! I didn't even realize there was more to the social media system until she commented about it.
* I primarily didn't buy the girl cigarettes because I wasn't sure how much money I needed to save for the rest of my shopping. I also got confused when shopping, expecting that Ekaterina would send a shopping list and I was concerned I'd get the shopping wrong.
It's kind of difficult to tell what kind of game it is from just the itch.io page, though, and I could've easily missed it if I didn't choose to try it out. I'd recommend adding a screenshot for the social media system and the map, to demonstrate that you have more features than a visual novel. You might also consider describing how the game expects players to be a bit more observant, and won't always give everything to the player directly. (Such as when shopping for Mariya's birthday gift.) This could help draw more players in to your very impressive game.