Natsume's Book of Friends (2008)

S1E5 Heart-Colored Ticket

While sifting through Reiko's belongings, Natsume stumbles upon an old train ticket and feels compelled to visit the deserted train station to uncover its significance. Upon his arrival, he encounters a somewhat dim-witted spirit named Santo, who has been patiently waiting for Reiko to join him on a journey to Kiriganuma, hoping to reconcile with his friend Mikuri. However, the journey proves to be more challenging than it initially appears.