It’s hard to call my senior oppa

(1)Blavla. Yesterday’s civil servant
(2)Girls, call your senior oppa
(3)It’s hard to sing
(4)A female employee who is 15 years younger than me entered our department, but the man who didn’t get married because he wanted to be close to me is an older brother, so I call him an older brother instead of an older brother haha Even if I say this, the female employee keeps calling me an older brother
(5)Girls, it’s so hard to call me oppa