We use a sample of 220 face-on bulge-less galaxies situated in the low density environment to estimate their total mass via orbital motions of supposed rare satellites .
Our inspection reveals 43 dwarf companions having the mean projected separation of 130 kpc and the mean-square velocity difference of 96 km/s .
For them , we obtain the mean orbital-mass-to-K-band luminosity ratio of 20 \pm 3 .
Seven bulge-less spirals in the Local Volume are also characterized by the low mean ratio , M _ { orb } / L _ { K } = 22 \pm 5 .
We conclude that bulge-less Sc-Scd-Sd galaxies have poor dark halos , about two times lower than that of bulgy spiral galaxies of the same stellar mass .