Tachibana Junichi's heart was shattered two years back when his date didn't turn up on Christmas Eve. Currently, he's a high school sophomore who spends his time in his closet planetarium, attending school, and catching up with his pals Tanamachi Kaoru and Umehara Masayoshi. The first two volumes describe Ayatsuji Tsukasa's arc, while the third and fourth volumes revolve around Tanamachi Kaoru. What's in store for the fifth volume?