[They will, clearly, need to bump into each other again. Chekov suspects Tohru to be approximately his age and he seldom has a chance to be around peers.]

Then we will split the pleasure. [He smiles at her assertion. At the rate she's going, she'll end up in a dizzy pile on the ground before the day is done.] Unfortunately, I cannot, and so I will leave you to honor someone else with your company.

[It's not flirting. These things just come out of his mouth when he's around girls.]