Today, it is becoming the norm to purchase difficult-to-breed scum and introduce them to people who would keep them as Suwakos.It was a stroke of luck that the value of recycling was created in scum, which until now had almost no use other than disposal.Suwako in this state does not need to eat because the victim Yukkuri's memory bean paste and central bean paste can be dissolved little by little and become nutrients.In order to acquire the ability to speak, it has the property of parasitizing the bodies of other species and taking over control.Although it is possible to act with its main body alone, it cannot produce vocalizations similar to language like other species.