Your browser does not support grid, so will not be supported. Hover over your browser version to see if there is a way to enable potential support. Sorry, I am no longer able to justify working on making the layout work on older devices.
Don't open it! This is a pun based on Kiri's catch phrase. The version of the word "open" used here: 「明く」 is typically used to mean "opening the new year". The typical version of "open" normally used is 「開く」.