Cassette Tape (S04E08)

A man has returned to his hometown to attend the wedding of a friend from elemntary school. To please his family, he arrives a day early to stay at his parents' home the night before. As he's marveling at how his childhood bedroom hasn't changed at all, he discovers a cassette tape in a desk drawer labeled "What Happened Today" and decides to listen to it... (Crunchyroll)