I would have dropped this series if it weren't for the story being very very interesting and Ping was just so darn cute and really good at his character.

Guitar seemed a bit off his game. I'm thinking that maybe he was getting sick or he was exhausted. I don't have to have hot passionate scenes for BL. they could be light and fluffy... But Guitar just did not seem to warm up to Ping or pick up what ping was laying down if that makes any sense.
They seem to have really good chemistry at the beginning of the show but towards the end things changed... not in the plot, but in the way the Guitar was reacting. again I think maybe he was sick.