[Ehee- she smiles a little as she tries to say it back to her.]
Senpai, it... [Hmm, how is it best described?] It's like a senior. Someone who is more experienced, and typically older. [Does that help?] Hanabusa Aidou is a year older and helps tutor me. So I call him 'Aidou-senpai', or sometimes just senpai for short.
[She looks confused for a moment...] He's kind of become my home school teacher though, too. But calling him sensei never really felt right. [A nod.] So just senpai is good for Aidou-senpai.