Yoon Hee Seop, a bass singer from Germany( Photo courtesy of Gloria Opera) Do you like opera? Opera is a representative comprehensive art. Opera is also the most expensive art genre. Some even call opera "the lowest cost-effectiveness art in the world." Opera has a high wall even for classical enthusiasts. Classical lovers say, "The end of listening to classical music is opera." Nevertheless, there are many opera enthusiasts in the world. Are the charms that we don't know hidden like treasures in opera? I interviewed an opera singer after a long time. bass singer Yoon Hee-seop returned home last year after nearly 20 years in Europe. The country where he was mainly active was Germany. He has a splendid career, including an exclusive soloist at the Hamburg National Theater in Germany and an exclusive soloist at the Casel National Theater. He is a veteran of more than 1,000 opera performances. He has already been asked to appear in operas since he started his dom