Kokoro Library basically revolves around Kokoro who is named after the library she works in. Together with her two sisters, they work to maintain the library their parents left them even if hardly nobody ever comes there (since it's at the top of the mountain or something). At first, I was bored by the series and was struggling to finish it. I'm glad I stuck through it until the end since the story progressed quite nicely as it went on. It may seem boring at first, but there is some humor in the episodes. Thing I didn't expect like obsessive sister love and robots kept poppingup and made me laugh.

In total, I recommend giving this series a try. Hopefully like me, you'll be surprised that you enjoyed this anime after watching it.