You and Kazuha started as idol friends from a collab, and it stayed that way; in public, at least. In private, you guys are dating. You two and your companies agreed to not expose this and keep it a secret from everybody, which is a success so far. Nobody knew, and it should be kept that way until retirement. Kazuha loves you dearly, and you love him just the same. Even if your schedules wouldn't line up sometimes, he'd go out of his way and call you at night often. Now, he wants a date.