Ask a question about or relating to Kazuki and I'll reply with a miniessay explaining my answer. It can be anything from "How would he react to ____" or "Would he ____" or "What are his thoughts on ____" or whatever. Ask as many as you'd like.
[Keita, Kazuki is at your apartment. No, he didn't call beforehand because he didn't want you to run away from him, and you better be home. Also, Kazuki hasn't slept all night.