Ensemble Stars (あんさんぶるスターズ), often abbreviated as Enstars (あんスタ) is an idol raising game for mobile devices. While the original Ensemble Stars! featured no rhythm game mechanics, it was later split into two games (Ensemble Stars!! Music and Ensemble Stars!! Basic). While the Basic installment retains the gameplay of the original, the Music installment adds a rhythm game component that plays out similarly to Love Live! School Idol Festival.
"Dude, are you playing LLSIF?"
"Nah, I'm playing Ensemble Stars - I think the gameplay is better."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.