Sankarea OVA

Synopsis

Seven months before Chihiro first met Rea, he, his father, Mero and Ranko travel to Tohoku to help sort and move large book collection of father's brother. Along the way, they pass a bridge that seems familiar to Chihiro somehow, which leads him to question why he remembers so little about his mother, Yuzuna. Meanwhile, Rea, who had just finished middle school, faces abuse from Aria as she vents her drunken frustrations on her. As Chihiro helps clean up the books, he discovers a box containing a book about bringing back the dead. Despite being told it is worthless, Chihiro becomes interested in it and keeps it for himself. As Chihiro gets lost whilst trying to follow Ranko and Mero to a waterfall, he comes across an open air bath where he briefly encounters Rea before running off, which ends up smudging the book a little.

(Source: Wikipedia)