As Wakana comes down with a cold, Konatsu decides to pay her a visit, reminding Wakana of her promise with Mahiru to write a song together. Later, Wakana receives a tape from Shiho containing a recording of when Mahiru was in the choir club before Sawa takes her horse riding. The next day, Wakana helps Taichi and Atsuhiro with their vocal training before visiting Tomoko and her new baby. Later that day, Wakana learns from her father why Mahiru kept her illness a secret from her; because she didn't want the song they wrote together to be a sad one...