Plus I haven't gone anywhere with sadera we need walkthroughs man:/
I don't remember the order exactly, but these are the events you have to do:
* Go to the ramen shop at night and complete all the activities to learn about Yoruiichi's story.
* Complete all the dialogue options with the ramen shop manager until he recommends a shop to you.
* Talk to Hima in the afternoon until you win her over (buy her snacks from Tenten's shop).
* Talk to Hima in her room until you max out her respect, then take her shopping for clothes.
* Buy the camera at Tenten's shop.
* Ask Hima to be your model.
* Talk to Yoruiichi (be nice to her so she trusts you) and convince her to be your model.
* Convince Hima to be your model.
* Visit the abandoned alley at night several times until the mysterious figure speaks to you.
Once you complete all these events, you can sell photos to the figure, and he will give you the necklace in exchange. The event on the 14th is not yet available, nor can you do anything with Sarada other than see her.