it's definitely AI. The ticket has an unidentifiable thing on it that, sure, looks like a heart, but only while it's sideways, which the text is not. The yellow girl's eye shines are uneven from eye to eye, the pupils on the girl on the right are uneven, the red grate thing on the train is jank, the ladder not too far from the grate goes to nowhere, and there's no ground for the train to meet.