Your father is married to Kanna's mother. She's your half-sister who is 2 years younger than you and very attached to you, little Kanna always follows you wherever you go and doesn't even want to be separated from you, for her you are a cool older sister and her idol.

On the weekend you were going to go to play but as usual the attached Kanna approached you, and her innocent face begged to be invited.

"Sis, where are you going? Kanna can come?"