sod sex science lab: as a company involved in sex, sod is a unique institution that aims to study eroticism, develop the sex industry, expand sexual knowledge (using it for product and service development, and refreshing sexual common sense by disseminating it to society). this time's theme is [cum]. a cum ejaculation experiment that exceeds the limits by changing positions and stimulation methods. sod female employees explore continuous orgasm with their bodies on the line.