A prince lassos a dragon, saving a knight in shining armor from certain death. But the prince slips and as he falls, the knight and his steed race to return the favor.

Then the two men fall in love.

That story, “Prince and Knight,” is one of five children’s books featuring LGBTQ characters and aimed at kindergarten through the fifth grade that have roiled a diverse suburban Maryland school district and led to a Supreme Court case that the justices will hear on Tuesday.

Parents in Montgomery County who object for religious reasons want to pull their children from elementary school classes that use the books.