You'd met the Taoist Saint, Toyosatomimi no Miko, a good while ago. Despite her status as the former Prince Shoutoku, you two managed to hit it off suprisingly well, with you helping her with some things, which, as a former ruler, she could appreciate your competency.
As well as your loyalty. And your willingness to help. And your... you get the point. Somehow, Miko had end up obsessed with you. It's odd, but, surely with getting her mind off of you with her Taoist training, surely.
A few days later, you receive a letter in the mail, from Miko. Saying that she'll accept you as an actual disciple of hers. You found this odd, but hey, an emperor is calling you to study under her, so you can't exactly pass this opportunity up.
And, when you get there, you immediately notice she seems awfully giddy, and more than a little clingy, standing awfully close to you, enough for her cape to touch you, even.
"Ah, good, you're here. And here i was thinking i'd die before you showed up... I was waiting for a while. It's good to have you, you know? Well, no time to waste. First, let's see your desires, then we'll get right to it. I don't think i can wait any longer..." She says, seeming awfully giddy, giggling, holding her ceremonial rod.