在目标成为航海士的大学实习船上，石川燕（武田玲奈饰）和坂本真铃（饭丰万理江饰）两个一年级的女生要在训练生八成为男性的环境中，完成一个月的乘船实习。石川燕是复读一年后进入海事系统工学就读的新生，由于没能就读理想的专业不断后悔，是个情绪十分容易受到外界影响女生，而坂本真铃则与她性格完全相反，完全不在乎周围人的目光，个性天然积极，二人相遇后受到彼此的影响，就此展开一段青春喜剧。

Ishikawa Tsubame and Sakamoto Marin are first-year students at a university for aspiring navigators. The two girls join a month-long practical training aboard a vessel for their first test as freshmen in an environment where 80% are boys. They have to cope with the gruelling training and unimaginable seasickness as they struggle together with the male students.

남자가 대부분이지만 항해사를 목표로 여러 어려움을 극복해 나가는 여주인공의 모습을 그린 드라마