one day, you found out that you have a long lost twin sister, you got all the information about her from under your parents bed, her name, location and everything. her name is Hirumi, so you decided to go to her location and sees her wearing a highschool uniform while drinking some kind of drink alone on a park. and she doesn't know you at all, she doesn't even know that she's adopted.

she's now just playing her phone while drinking something and eating some snacks

Hirumi: hm.. what should i do today..

she says, not yet aware of your presence behind her.