Despite how wholesome this should be, the nature of the artist is giving off some red flags. I've seen her work on Twitter before and she's a Tsubasa/Chris shipper who sometimes draws unfortunate art of them and I think I've even seen some suggestive stuff with her Tsubasa-san/Chris-chan art. The yuri tag is also a bad sign. It's a shame because if I didn't get the feeling I was supposed to rooting for some romance between a child and a teenager, it would be cute.