Classroom of the Elite is a light novel series that received an anime adaptation in 2017.
The story follows Kiyotaka Ayanokoji, an quiet and unmotivated student who has just enrolled at Tokyo Koudo Ikusei Senior High School, where it's said that 100% of students go on to college or find employment. But he ends up in Class 1-D, which is full of all the school's problem children.
Episode 2 Edit
Kiyotaka is in a swimsuit while the class has a swimming lesson.