I'll Become a Librarian

The story begins with the eldest sister Iina appraising the red library uniform designated for her baby sister Kokoro who is starting out as a librarian at Kokoro Library. After the middle sister Aruto scolds Kokoro to always be punctual and Iina photographs the occasion, Iina and Aruto's divergent perspective of professional conduct gives way to the three…

Synopsis excerpt via Kitsu.