Considering this would have happened if Sakuya hadn't shown up, one can see why Yuyuko's reaction to Youki and Sakuya's interactions. Though Yuyuko would instead get a piggyback ride from an oni instead.
What is the matter?...and then to think I'd fall and sprain my leg...I just wandered off ahead on my own without listening to you...You are disturbingly forthright today.Say...No.I apologize...I could not show you the scenery of the land..... No, it's nothing.Hnnn...sniff...You're so nice, Youki.As your attendant, it is my responsibility....mm-hm.Yes?Yes?Are you all right?Hnnnh...I'm sorry, Youki...Never mind the scenery....Youki.Youki, I think I l-...