Irritated Heart Rate!.Rin's early history is seen, including how he transferred into Iwatobi elementary school and became friends with Haruka and the others, revealed his dream of becoming an Olympic champion to honor his father and convinced the swim team to enter a relay together before going to Australia. Meanwhile, Rei asks his teammates how their relationship with Rin fell apart. Haruka tells the same story Coach Sasabe told Makoto about Haruka's middle school race against Rin. Thinking it doesn't quite make sense, Rei decides to meet Rin face to face.