Contains spoilers for the first volume of HakoMari
Time is a frequent theme in fiction, and in the anime realm it is just as popular as anywhere else. Time travel is one of the most common sci-fi ideas in fiction, but the idea presented in the first volume of Utsuro no Hako to Zero no Maria is much less commonly presented. The idea of a Groundhog Day Loop isn’t uncommon, but the length of the loop in HakoMari is something I haven’t seen presented elsewhere.