Boku wa Tomodachi ga Sukunai S01E12 - We Have Few Friends

Yozora recalls how she recognised Kodaka as her childhood friend, Taka, the moment he transferred in, but he wasn't able to recognise her, which led her to form the Neighbours Club. Yozora to Kodaka that she originally intended to reveal her true gender to him before she moved but was too embarrassed. She also acts to keep the fact they were childhood friends from the rest of the club and just call her by her regular name. Astounded by her new look, Rika gets Yozora to dress up in a boy's uniform as Kodaka contemplates what'll happen from now on.