Toe! Space Attendant Aoi

In a future where space travel has been made possible, Cetacea Aviation has begun to employ "space attendants" who are skilled in hand-to-hand fighting due combat hijackers who use their own bodies as weapons. Aoi Musashino is one such space attendant, but is unskilled and even calls herself a "clumsy, awkward, but cute turtle." Another space attendant named Yasaki, who has recently been transferred from local to interstellar flights, gets to know a boy named Laika, who says that his songs bring people misfortune.

(Source: ANN)