I have a couple suggestions to help the story flow better and make more sense in regards to Anna's love level and events:
1st
Anna is supposed to have had her first real sexual experience with the MC's dick when she hits 4 hearts in the studio and sucks it. However, I have coasted on Anna with 3 hearts and hit Valentine's day and when you take her to the movies, she touches your dick as well as sucks you off in the theatre. So that doesn't make any sense when she is still "scared" to touch it in the studio. IF possible, for each holiday, you may need to add new lines of dialogue as well as need to "gate" certain content with Anna if you are not at enough hearts with her. Valentine's day makes it feel like you HAVE to be at least 4 hearts for the blowjob scene to make sense. But if you keep her timid and at bay and nothing super sexual happens because you are only at 3 hearts or 2 hearts, that flows better as a player.
2nd
This is essentially the same as the 1st point but its at the dairy farm. You unlock it at 3 hearts, and can milk as much as you want to your hearts content. With the milk coins, you buy Anna's cowprint suite and can do the photoshoot with her where....she sucks you off again. Again, it doesnt make sense when in the main story, she doesn't dare to touch the MC's dick yet. I would suggest either to not make her cowprint suite available to purchase until she has reached 4 hearts, change it to a simple regular photo shoot in the cowprint outfit if you only have 3 hearts with her, OR don't allow the dairy farm to open up to the MC until you reach 4 hearts, not 3.
Just some QOL things that would kinda feel smoother overall in the gameplay. Thanks