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.
Being an idol comes with a lot of crappy setbacks. Honoka just learned one of them: Potentially getting kidnapped and tied up by obsessive fans. Well, at least she has practice if this ever happens again...