This is what I'm thinking. In the first chapter Hana call him "welcome back honey..." in this chapter the waitress is shocked about the appearance of the MC and when Hana speak about "the face" we are seeing her looking at his right side and hiding his left face with her drink... My guess, he is looking like an ancient crush of Hana (probably dead), wellknown in this countryside. This what the waitress "ask" the MC to not looking for a girl at Uni and implying more or less he could "date" Hana...