Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
물물 교환은 서로 필요한 것을 주고받는 것입니다.mulmul gyohwan-eun seoro piryohan geoseul jugobadneun geos-ibnida.Water-to-water exchange is about giving and receiving what each other needs.