Simplify the following text for a Grade 8 native English-speaking person.
Original: 1923 : Protagonist and narrator Charles Ryder , a student at Hertford College , Oxford University , becomes friends with Lord Sebastian Flyte , the younger son of the aristocratic Marchmain family and an undergraduate at Christ Church .
Simplified: Charles Ryder , who tells the story , is a student at the University of Oxford . He makes friends with Sebastian Flyte , the younger son of an aristocratic family .