On Tanabata night (7/7), Orihime and Hikoboshi meet across the Milky Way, while 七福神 (the Seven Lucky Gods) sail by on their treasure ship.
Hear the crowd chant “なな! しち!” like waves lapping-soft nana, sharp shichi-two sounds, one number.
So remember: a sword cut and a line make 七, carrying festivals, gods, and lucky sevens wherever it goes.