The Sky of Endless Blue.Riki invites Mio to be the baseball team's manager, which she ultimately accepts after initially thinking that they were starting an all-male idol group. After Mio reveals to the Little Busters that she will not participate during baseball practice and that she has an aversion to sunlight, Kyousuke still welcomes Mio into the Little Busters. After baseball practice, Mio brings everyone hot tea, and they exchange phone numbers with her. The next day, Kyousuke gathers the Little Busters together in preparation for a tanka competition held at school. However, Mio is left alone partway through when the others decide to write one line of poetry each, but with failed results. Riki later finds Mio sitting under her usual tree, and he soon realizes that she wants to fly off somewhere and disappear. Riki tells Mio that there was a girl resembling her in town, but she was not carrying a parasol. Before leaving, Mio tells him that she plans on submitting a tanka in the competition. The following day, Mio is absent from school, and Riki overhears his classmates gossiping about the same girl in town without the parasol. After school, Riki sees the girl standing below in the courtyard.