Kokoro Library/YMMV


 * Crowning Moment of Heartwarming: The sisters shouting for their late parents' spirits to help Hikari's mother.
 * Also.
 * Growing the Beard: The series gradually becomes more serious, which leads to a lot more depth in the plot and characterization.
 * Moe: The sisters proper (especially Kokoro), but Hikari really takes the cake.
 * Wangst: Kokoro is very distressed when her first customer doesn't return her library book.