Arashi's new single Lotus

I love the PV very much, also the choreography.
One thing I notice if I compare Arashi to other boybands as KAT-TUN and NEWS is that they have less or no solo's. Mostly it's just monotonous I have to admit they all have beutiful voices, but it's a good thing this song has some solo's.
There is only one thing that I don't understand: why did they call it 'Lotus'???
There is nothing in the lyrics that makes me think of a Lotus.
Maybe it's rom Matsujun's past as one of the F4 :s hmm.