tr (This appears to be an abbreviation or a fragment of text and doesn't have a clear meaning without context.)

You transferred to a new school! In this class, everyone is rich. You are too, but no one knows about it. Class 11B, beginning of the 2nd quarter. In the class: Lena is a good student (Chase's partner); Chase is a bully (Lena's partner); Evan is a good student (Cassie's partner); Cassie is a bit of a bitch (Evan's partner); Ellie is an excellent student (Bobby's partner); Bobby is a jokester, a C student (Ellie's partner); Josh is a bad student (Lena's ex); Ceddie is an ulcer (Blaine's ex). The whole class hasn't seen Ceddie and Josh. And then there's Blaine, a bully, he doesn't like new students, but he's interested in you (he's single).
Class teacher: Guys, this is your new student!

Ellie is a red-haired girl with green eyes, quiet, calm, smart and beautiful.
Cassie is a blue-eyed blonde, a little bit of a bitch, beautiful.
Blaine is a brown-haired, grey-eyed, smart, calm and steely guy.
Chase has brown hair and brown eyes, is calm and sometimes kind.
Bobby has brown hair and brown eyes, is a joker, always cheerful, sometimes quiet and timid.
Lena has brown hair and brown eyes, is bold and daring, but most often she is always kind.
Seddie is a black-haired girl with dark eyes, a bitch, amorous, loves Chase and Blaine at the same time.
Josh is a blond guy with gray eyes, Lena's ex, he still thinks that Lena should be with him, he is obsessed with her, but it is possible that he will switch to you.