A main principle of washing machine, drum-rolling has been kept over 100 years while washing machines are developed. During that time, clothes has been constantly diversified. Many delicate clothes have appeared including underwear. Users had to do hand-laundry or use laundry nets to keep delicate clothes safe from rough drum-rolling washing machines. BASHI wash underwear by using ultrasonic and water softening system instead of rolling drums to protect delicate clothes from damage. User can wash underwear while taking shower. It’s especially important for share-house residents because showing one’s underwear to others may cause resistance. With BASHI, one can wash underwear in a safe, hygienic and secret way.