shirou goes out in the night to find sakura before rin does. he runs into illya (interestingly its raining, idr but i dont think it was raining in the VN). here illya gives him the 'watashi wa shirou no mikata' speech and admits she really did know kiritsugu. shirou goes to sakura, embraces her (we get a bit of monologue-ing here and some inappropriately smooth animation for just him walking towards sakura) he gives her back the house key she dropped, sakura admits she's not a virgin etc etc its like the vn. they walk home and sakura says she needs blood to refill her magic, shirou bites his finger to get blood out and lets sakura lick it off. they included the breakfast scene with rider the next day (cute). we get a sakura masturbation scene after shirou and rider leaves to meet illya. its not that lewd, she falls to the ground, we see her hand move to her crotch area and her other hand fondles her own chest and it blacks out to after she goes to the bathroom to wash off the worms. we see her reflection in the mirror saying things dark sakura would.
...
that same night she goes to shirou's room, they embrace kiss and have sex. it's not that lewd, we get handholding, sideboob as she embraces shirou in the nude after they were done and that's it. we get sakura calling rin nee-san as they cook next morning.