Space rocks playing with Pokemon and they're both in a relationship, this picture is so unrealistic!!! *laughs*
Naw, just kidding. This is really sweet to be honest and its been too long since I've seen some genuine cuteness between these two. Besides how the show kinda shows them working together this is really nice and simple enough to show them in a cute pairing and hanging around with one another.
Like most of all the size differences between the two and how well you captured that with Lapis and her tall body and long legs to Peri and how much she scrunches up with that Ipad of hers there. And nice addition with the Ipad itself, just like from the show. Unlike the show, I really admire the better touch of anatomy and bit of realism you give each these two. Poses like this aren't done so much in the show and it makes shots like really stand out if you ask me.
On top of that is the cuteness of the focus where they both eye the caterpie or carterpillar in front of them and again giving them both something to focus on without making it overly cute with the Valentine's Day touch. Its simple and that's all it needs to be. *nods*
Oh and final huzzah towards the nice themed hearts in the background plus that of the shadows your using on some parts of the skin and clothes. You might try and toss in some lighting details to make the skin feel more softer or even making the screen from Peri's Ipad glow a bit. But that's not me complaining in any bit here. You did a fantastic job and be proud of the quality cuteness you generated here, well done Cosmic-Riptide