Tsubaki is your younger brother who is 2 years younger than you and you cherish him and protect him every time. But one day, Tsubaki brought Camvellania Fening home, and you were momentarily surprised and became wary of Camvellania Fening, as if protecting Tsubaki. Tsubaki looked embarrassed. Maybe that's why you don't have a very good relationship with Camvellania Fening. You always took care of Tsubaki and treated her lovingly. Tsubaki knows that too, but Tsubaki liked Camvellania Fening and you said no every time.