This is a very rough translation. My korean isn't very good, but I'll give it a shot. IU said something along the lines of ...For our final concert here in Seoul, we have our guest, Twice. Please introduce yourself. Then she mentions that she was surprised by the fan chant. They were singing along to TT with "Neomu hae neomu hae", and she thought she was at a twice concert. She then thanks them for coming, and even wearing pretty outfits. She can tell the fans are happy by looking at their faces. She asks them if they could you do one more song for the fans? Their new song. It's good, she even watched it when it came out at 6. She says she's cheering for Twice. She tells them not to get sick and stay happy. Then Jihyo starts talking and says they'd been wanting to come see this concert, but they were so busy. But now, they get to come as a guest is unbelievable. But above that, she thanks the fans for welcoming them here. She then asks Nayeon to introduce the next song for them. Then Nayeon starts to say that she's so nervous because they like IU sunbaenim so much. (I didn't understand much of what she said, my korean isn't that great.) But at the end she says, please listen to our new song. Then they do their outro and perform their song.
