Melanie's eyes were fixed on Tae-Joon as she wondered who he was and why he reminded her so much of her twin boys, while Melvin was looking at Tae-Joon with a grin, happy to see his idol but also wondering why Brad was looking at him like he didn't know him, or why Brad was in this house at this time.
He wasn't necessarily surprised that Grace knew his name since he was sure that Brad must have probably told her about him. His business was that Brad hadn't mentioned that he was traveling to Country A while they were talking the previous day, and he had confided in them about traveling with his mother.
