: While the character writing remains strong, the production quality by TMS Entertainment was criticized. Some reviewers noted that the episode lacked the same emotional punch as the manga version, citing "distractingly low-quality" animation and choppy transitions.
: The sci-fi explanation for the letters is widely considered the episode's weakest point. Many viewers on Reddit felt the pseudo-science of "black holes at the bottom of the ocean" was tacked-on and unnecessary, preferring the mystery of the letters to remain unexplained. Thematic Impact Orange Episode 12
: In the current timeline, the fallout from New Year's has left Naho and Kakeru nearly unable to speak. Kakeru meets old friends from Tokyo who callously dismiss his suicidal feelings as "cowardly," further isolating him. : While the character writing remains strong, the