"The year is 2025, the older brother decides to trust himself just one last time. It’s the start of an adventure that aims for Mars via JAXA in the town of Tsukuba! The official Space Brothers manga is ready to launch! Two brothers looked to the starry skies as children and made a promise. And now, in the year 2025, the younger brother, Hibito, is carrying out his promise. He is an astronaut who has been selected as a crew member for mankind’s first long-term base on the moon. Meanwhile, the older brother, Mutta, has just been fired from his job and is unemployed. A text message from Hibito sends him applying to be an astronaut and shooting for the stars!"

2025年、弟・日々人に招待され、ジョンソン・スペースセンターに行った兄・六太。そこで待っていたのは、幼少時代の約束を信じ、宇宙飛行士になった弟・日々人のたくましい姿。 兄は嫉妬し、夢を諦める。弟は、そんな兄の才能を信じて挑発する。 「二人で宇宙へ行く」という約束を、弟が忘れた日はない。

羨ましい。どこまでも羨ましい。弟が、弟だけが先に月へと行ってしまう。兄はいまだ宇宙飛行士選抜試験、第3次審査。完全閉鎖環境での2週間。宇宙への夢は諦めることができない。覚悟を決めた兄、ウジウジしながらも試験に挑む。

宇宙飛行士選抜試験、第3次審査。順調だった日々が懐かしく思えるほど、突如巻き起こった不穏な空気。仲間への疑心暗鬼。育つは不信感ばかり。これが、宇宙飛行士になるということなのか。いや、絶対に違う。ひとつの試練を打ち破ったムッタたちにさらなる試練、選抜の時が訪れるーー。

the 3rd exam, only two person can go through. who is the last one who can get the position to go final?

The year is 2025, the older brother decides to trust himself just one last time. It's the start of an adventure that aims for Mars via JAXA in the town of Tsukuba! The official Space Brothers manga is ready to launch! Two brothers looked to the starry skies as children and made a promise. And now, in the year 2025, the younger brother, Hibito, is carrying out his promise. He is an astronaut who has been selected as a crew member for mankind's first long-term base on the moon. Meanwhile, the older brother, Mutta, has just been fired from his job and is unemployed. A text message from Hibito sends him applying to be an astronaut and shooting for the stars!

The year is 2025, the older brother decides to trust himself just one last time. It's the start of an adventure that aims for Mars via JAXA in the town of Tsukuba! The official Space Brothers manga is ready to launch! Two brothers looked to the starry skies as children and made a promise. And now, in the year 2025, the younger brother, Hibito, is carrying out his promise. He is an astronaut who has been selected as a crew member for mankind's first long-term base on the moon. Meanwhile, the older brother, Mutta, has just been fired from his job and is unemployed. A text message from Hibito sends him applying to be an astronaut and shooting for the stars!

The year is 2025, the older brother decides to trust himself just one last time. It's the start of an adventure that aims for Mars via JAXA in the town of Tsukuba! The official Space Brothers manga is ready to launch! Two brothers looked to the starry skies as children and made a promise. And now, in the year 2025, the younger brother, Hibito, is carrying out his promise. He is an astronaut who has been selected as a crew member for mankind's first long-term base on the moon. Meanwhile, the older brother, Mutta, has just been fired from his job and is unemployed. A text message from Hibito sends him applying to be an astronaut and shooting for the stars!

宇宙での遠近感はたやすく失われる。日々人たちの乗ったバギーは、クレーターの闇に消えた。壊れたバギー、負傷したダミアン、酸素のメインタンクを失った日々人。周囲の助けも望めぬ今、日々人が向かう先は──!？

The year is 2025, the older brother decides to trust himself just one last time. It's the start of an adventure that aims for Mars via JAXA in the town of Tsukuba! The official Space Brothers manga is ready to launch! Two brothers looked to the starry skies as children and made a promise. And now, in the year 2025, the younger brother, Hibito, is carrying out his promise. He is an astronaut who has been selected as a crew member for mankind's first long-term base on the moon. Meanwhile, the older brother, Mutta, has just been fired from his job and is unemployed. A text message from Hibito sends him applying to be an astronaut and shooting for the stars!