An independent collection of short stories — Ultramarine Schooldays highlights the color that evokes faithful memories, tenderness, and melancholy. These stories take place in Japan and in the West, in the past and in the present. They may involve a romance in the city, an energizing walk in the forest, the daily mundane life of a waitress working in a café, or a medieval intrigue; but what connects these stories are the powerful messages they deliver.

Volume 1:

1. "Tale of Tail" ("Window to the Spirit World" | 異界の窓)
2. "Princess Prisoner" (とりこの姫)
3. "Teacher and I" (先生、僕は)
4. "Flower's Cavalier" (花と騎士)
5. "Pink Chocolate" (ピンク・チョコレート)
6. "Forest of Wonder" (森へ)
7. "White Fire, Act 1" (白い火【前編】)
8. "White Fire, Act 2" (白い火【中編】)
9. "White Fire, Act 3" (白い火【終編】)
10. "Albertina" (アルべルティーナ)

Volume 2:

1. "Ninon's Love" (ニノンの恋)
2. "Time-Bell" (時鐘)
3. "The Ten Swords of the North, Part 1" ("Xenia and Reuther, Part 1" | 北の十剣【その1】)
4. "The Ten Swords of the North, Part 2" ("Xenia and Reuther, Part 2" | 北の十剣【その2】)
5. "The Ten Swords of the North, Part 3" ("Xenia and Reuther, Part 3" | 北の十剣【その3】)
6. "The Ten Swords of the North, Part 4" ("Xenia and Reuther, Part 4" | 北の十剣【その4】)
7. "The Ten Swords of the North, Part 5" ("Xenia and Reuther, Part 5" | 北の十剣【その5】)
8. "His Music" (彼の音楽)
9. "Pink Chocolate, Continuation" (続 ピンク・チョコレート)

Volume 3:

1. "Red-Roofed House" (赤い屋根の家)
2. "Pink Chocolate, Continued Again" (続々 ピンク・チョコレート)
3. "Twilight, Act 1" (薄明【前編】)
4. "Twilight, Act 2" (薄明【終編】)
5. "Merry Garden" (メリー・ガーデン)
6. "Oenothera Princess, Act 1" (待宵姫は籠の中【前編】)
7. "Oenothera Princess, Act 2" (待宵姫は籠の中【中編】)
8. "Oenothera Princess, Act 3" (待宵姫は籠の中【終編】)
9. "Snowfall Night" (雪降り積もる)

Volume 4:

1. "Over the Bridge, Act 1" (橋の向こう側【前編】)
2. "Over the Bridge, Act 2" (橋の向こう側【終編】)
3. "Rainbow Picnic" (十色ピクニック)
4. "Rainbow Familia" (十色フアミリア)
5. "Rainbow Tomorrow" (十色トウモロー)
6. "Spy and Spy" (スペイ・アンド・スペイ)
7. "Pink Chocolate, Continued Again and Again" (続々々 ピンク・チョコレート)
8. "Pink Chocolate, Perfection" (完 ピンク・チョコレート)
9. "Old Elm" (老楡)
10. "Farewell to Gunjyo Schooldays" (本日はむ日柄も良く)