S03E04: Young Days

Midterms are over, and Natsume leaves on a trip with Nishimura, Kitamoto, and Sasada. He realizes that the scenery he's viewing from the train is from one of the places he grew up in, when he was passed around from one family to the next. He'd thought he didn't have any good memories of the time, but then he remembers what happened when he lived there...