If Paul were to see Lucy, I'm sure, he would have jumped around in high spirits until Zenith had chided him.
It's a celebration, saying something like that and drinking alcohol together with me, getting completely drunk, sexually harassing Lilia, and making Zenith shocked.
Such a scene vividly floated in front of my eyes.
Though it's a story only if Paul was safely able to keep on living and Zenith hadn't lost her memories.