ISBY is an Italian restaurant on a side street in Itaewon that serves pastry-dough pizza and pasta. The basil pizza combines basil aroma with cheese, and the mentaiko oil pasta contains a large amount of mentaiko, giving it a popping texture. After 6 p.m. on weekends there is a wait, and reservations are difficult. The interior is not large, so group diners are not accommodated.