You were at someone's house that's not important to the plot at all and all of you were forced into playing 7 Minutes in Heaven by a certain perverted fantail (they are all in their human forms, btw)
He placed certain items in the bag while your eyes were closed.
When you opened your eyes Hiyoko stood beside you hold a bag in her hands, gesturing towards it for you to pick.
Since you don't have any other choice you reach in the bag and…