When they were young, the brothers Mutta and Hibito promised each other they would become astronauts. Now, in 2025, Hibito has followed his dream to become the first Japanese on the moon, but Mutta has just been fired from his job. His brother reminds him of their childhood promise, and Mutta decides once again to aim for space.
| Title | Time | |
|---|---|---|
| 1 | Little Brother Hibito and Big Brother Mutta | 2012-03-31 |
| 2 | My Shining Star | 2012-04-07 |
| 3 | The Man with the Advantage and the Running Female Doctor | 2012-04-14 |
| 4 | Next to Hibito | 2012-04-21 |
| 5 | Days of Missing | 2012-04-28 |
| 6 | Et Cetera in My Head | 2012-05-05 |
| 7 | Dear Hibito | 2012-05-12 |
| 8 | Smoky Heaven | 2012-05-19 |
| 9 | Individual Resolve | 2012-05-26 |
| 10 | Running Bus | 2012-06-02 |
| 11 | Trapped Rivals | 2012-06-09 |
| 12 | My Name Is Itou Serika | 2012-06-16 |
| 13 | 3-D Ant | 2012-06-23 |
| 14 | Broken Glasses and the Sole of the Foot | 2012-06-30 |
| 15 | Let's Talk About Space | 2012-07-07 |
| 16 | Alarm, but No Clock | 2012-07-14 |
| 17 | The Culprit Is in the Room | 2012-07-21 |
| 18 | Roo-ra! Kenji! | 2012-07-28 |
| 19 | The Day Before Goodbye | 2012-08-04 |
| 20 | The Worst Possible Punishment | 2012-08-11 |
| 21 | A Long-Awaited Glimpse of the Sky | 2012-08-18 |
| 22 | Working on the Dream | 2012-09-01 |
| 23 | Father, Son, and Mutta Claus | 2012-09-08 |
| 24 | The Worst Possible Interviewer | 2012-09-15 |
| 25 | Sonic Little Brother Training Big Brother | 2012-09-22 |
| 26 | Painful Interview | 2012-09-29 |
| 27 | One Question | 2012-10-06 |
| 28 | Miracle of Doha | 2012-10-13 |
| 29 | Night Before Launch | 2012-10-20 |
| 30 | Dog, Old Man, and Alexander | 2012-10-27 |
| 31 | Rocket Road | 2012-11-03 |
| 32 | A Private Place | 2012-11-10 |
| 33 | Moon Rabbit | 2012-11-17 |
| 34 | Pug and Hug on a Moonlit Night | 2012-11-24 |
| 35 | From the Little Corner of a Big Facility | 2012-12-01 |
| 36 | Dancing Astronaut | 2012-12-08 |
| 37 | Two Men in the Park | 2012-12-15 |
| 38 | Eleventh E-mail | 2012-12-22 |
| 39 | Lunar Illusions | 2013-01-05 |
| 40 | Heaven and Hell | 2013-01-12 |
| 41 | Eighty Minutes to Live | 2013-01-19 |
| 42 | Hibito's Choice | 2013-01-26 |
| 43 | Brian | 2013-02-02 |
| 44 | Three Astronauts | 2013-02-09 |
| 45 | Five Blue Rangers | 2013-02-16 |
| 46 | Number One Restless Guy | 2013-02-23 |
| 47 | The First Promise | 2013-03-02 |
| 48 | Always Have a Pedometer in Your Heart | 2013-03-09 |
| 49 | Nitta the Leader | 2013-03-16 |
| 50 | Nitta and Mutta | 2013-03-23 |
| 51 | Living Stone | 2013-03-30 |
