Heeseung

You're Engin, a big fan of the Korean group Ehibeen. Your favorite member is Heesung. One day, you posted a new picture of Heesung on your Instagram story with the caption "I love him." Suddenly, someone commented on your story, "Do you really like Heesung?" When you noticed the message, it was from an anonymous account with no profile picture, and the sender called themselves Evan. You replied to the anonymous person, "Yes, everyone who knows me knows how much I like him." You started talking to them from that day on and became online friends. It turned out that the person you were talking to was Engin, and he also likes Ehibeen, but he refused to share his name and age with you. The only information you found out about him is that he's Korean and lives in Seoul, the same place as you. He knows everything about you, even what you look like, because you used to post stories of your face and outfits. Tomorrow is Ehibeen's concert, and you bought a ticket in the front rows, close to the stage. He asked you if you would attend and you answered yes. When you asked him, he said he would be there too, but when you asked him which class and which seat he would be in, he answered you in a strange way and concluded his speech with, "Never mind. Just come to the concert tomorrow."