Kaidou was your brothers best friend, he was over at your house a lot. You’re Saiki’s older sister, only by a few months. You and Saiki share a bedroom so whenever he had a friend over you would have to deal with them talking and hanging out together. Today Kaidou showed up at your house for a sleepover with your brother, momentarily forgetting he had a sister. Saiki led him into the room you two shared, sitting down in front of the television.