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.

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。

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