Mariah the Scientist stopped by The Tonight Show to perform a medley of two songs, “Rainy Days” and “Burning Blue.” Both tracks appear on the R&B singer’s most recent album, Hearts Sold Separately.

“You never know when it will end,” says 17-year-old Aoi (Asuna Yanagi), as she explains to her homeroom teacher why she’s been skipping class to stream classic films at home. “What’s going to end?” ...