In "The Birkin", Lulu and Jane are told they're both tied for the top academic rank in the school. Lulu is deeply disturbed by this, as her dad will only accept her being number one, not being tied for it. A big test is coming up and both girls are hoping that it will put them in the top position. Come the day of the test, Jane, who got no sleep the night before due to the events of the episode, is also stressed out and worried she'll fail. When she walks into the classroom, she finds Lulu frantically memorizing equations at her desk, which leads to this exchange:
Jane: Hey Lulu? (beat) Good luck. Lulu:(sincerely) You too.