When the uke said "why are they leaving so quickly" I saw the white shirt underneath that blue jacket and the weird behavior of minhyuk I thought he was conspiring with the top but ofc it was the classic hypnosis.
There was also the weird placement of the book, the open door, and the unusual behavior of the sunbae during there meet-up.
But I feel like between junghwi and minhyuk, the sunbae isn't actually hypnotize, I'm not sure just a gut feeling. ┗( T﹏T )┛