Gauche Suede is on his last delivery before a big promotion. In the outskirts of Yodaka, the darkest area of Amberground, Gauche is surprised to find that the package is a young boy named Lag Seeing. Lag had been traumatized by his mother's abduction and is due to be delivered to his aunt. In this remote area rife with Gaichuu, Lag and Gauche face a dangerous journey that inspires Lag to become a Letter Bee.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Letter and Letter Bee | 2009-10-03 | 25 min |
| Season 1 | Episode 2 | My Friends | 2009-10-10 | 25 min |
| Season 1 | Episode 3 | Crybaby Boy, Letter Girl | 2009-10-17 | 25 min |
| Season 1 | Episode 4 | Lag's Dingo | 2009-10-24 | 25 min |
| Season 1 | Episode 5 | Dead End Town | 2009-10-31 | 25 min |
| Season 1 | Episode 6 | Letter to Jiggy Pepper | 2009-11-07 | 25 min |
| Season 1 | Episode 7 | Head Post Office Beehive, 13 Nocturne Way, Central Yuusari | 2009-11-14 | 25 min |
| Season 1 | Episode 8 | Meeting with Silvet Suede | 2009-11-21 | 25 min |
| Season 1 | Episode 9 | The Crybaby Boy's Vow | 2009-11-28 | 25 min |
| Season 1 | Episode 10 | Beneath the Light | 2009-12-05 | 25 min |
| Season 1 | Episode 11 | Letter of Lies | 2009-12-12 | 25 min |
| Season 1 | Episode 12 | The Red and Green Ribbon | 2009-12-19 | 25 min |
| Season 1 | Episode 13 | The Promised Land | 2009-12-26 | 25 min |
| Season 1 | Episode 14 | The Corpse Doctor | 2010-01-09 | 25 min |
| Season 1 | Episode 15 | Escape of Love | 2010-01-16 | 25 min |
| Season 1 | Episode 16 | Fan Letter to the Musician | 2010-01-23 | 25 min |
| Season 1 | Episode 17 | Letter Bee and Dingo | 2010-01-30 | 25 min |
| Season 1 | Episode 18 | Letter Pigeon | 2010-02-06 | 25 min |
| Season 1 | Episode 19 | A Sick Letter Bee and the Girls | 2010-02-13 | 25 min |
| Season 1 | Episode 20 | Lost Letters | 2010-02-20 | 25 min |
| Season 1 | Episode 21 | Potpourri of Memories | 2010-02-27 | 25 min |
| Season 1 | Episode 22 | Dream Link Notebook | 2010-03-06 | 25 min |
| Season 1 | Episode 23 | Honey Waters | 2010-03-13 | 25 min |
| Season 1 | Episode 24 | Heart's Recollections, Three | 2010-03-20 | 25 min |
| Season 1 | Episode 25 | The Person Unable to Become Spirits | 2010-03-27 | 25 min |
| Season 2 | Episode 1 | Promise | 2010-10-03 | 25 min |
| Season 2 | Episode 2 | Underwear and Bread | 2010-10-10 | 25 min |
| Season 2 | Episode 3 | The Hydrangea Colored Picture-Letter | 2010-10-16 | 25 min |
| Season 2 | Episode 4 | Lighthouse of Illusions in the Wilderness | 2010-10-23 | 25 min |
| Season 2 | Episode 5 | Reverse World | 2010-10-30 | 25 min |
| Season 2 | Episode 6 | The Little Girl Doll | 2010-11-06 | 25 min |
| Season 2 | Episode 7 | Film Noir | 2010-11-13 | 25 min |
| Season 2 | Episode 8 | Blue Notes Blues | 2010-11-20 | 25 min |
| Season 2 | Episode 9 | 200 Years of Loneliness | 2010-11-27 | 25 min |
| Season 2 | Episode 10 | Veritably Abbey | 2010-12-04 | 25 min |
| Season 2 | Episode 11 | Cabernet Attacks | 2010-12-11 | 25 min |
| Season 2 | Episode 12 | Light, Illuminating the Darkness | 2010-12-18 | 25 min |
| Season 2 | Episode 13 | The Scarlet Red Melody | 2010-12-25 | 25 min |
| Season 2 | Episode 14 | Day of Flicker | 2011-01-08 | 25 min |
| Season 2 | Episode 15 | Welcome Home | 2011-01-16 | 25 min |
| Season 2 | Episode 16 | Roda, Wandering | 2011-01-22 | 25 min |
| Season 2 | Episode 17 | Lies and Truth | 2011-01-29 | 25 min |
| Season 2 | Episode 18 | The Lost Heart Bullet | 2011-02-05 | 25 min |
| Season 2 | Episode 19 | Neither Malice, Nor Hatred | 2011-02-12 | 25 min |
| Season 2 | Episode 20 | The Smile of Hope | 2011-02-19 | 25 min |
| Season 2 | Episode 21 | Lawrence's Ambition | 2011-02-26 | 25 min |
| Season 2 | Episode 22 | A Place to Return | 2011-03-05 | 25 min |
| Season 2 | Episode 23 | To Akatsuki | 2011-03-12 | 25 min |
| Season 2 | Episode 24 | Battle! Yuusari Central | 2011-03-19 | 25 min |
| Season 2 | Episode 25 | Heart's Light | 2011-03-26 | 25 min |
| Writing | Masanao Akahoshi | Series Composition |
| Art | Maho Takahashi | Art Direction |
| Camera | Atsuho Matsumoto | Director of Photography |
| Visual Effects | Minako Shiba | Character Designer |
| Visual Effects | Keiko Kai | Color Designer |
| Directing | Akira Iwanaga | Series Director |
