#458 and 459: Happy New Year

 Made on New Year's Eve

https://puzz.link/p?shakashaka/14/5/r.wcaceu.r

https://puzz.link/p?tentaisho/13/7/nezxfofneu7b8ey7fh25fzkefgepeseifzh8eme

(I also tried making an Akari, but didn't end up finding a thematic presentation with cool logic.)