In general, the search for an anime with a Lovecraftian theme is fruitless since there are not many adaptations or the adaptations that exist are mediocre; in this context "Housing Complex C" is a breath of fresh air. The mystery is well handled although there are many elements of exposition "on your nose" that make it feel somewhat abrupt at times like a hasty copypaste of a Lovecraft page in a wrong way. Still, that can be justified with a duration of only 4 episodes; On the other hand, the mythology is well carried out and there is a good plot twist at the end.I recommend the series, although I can only recommend it to those actively looking for a cosmic horror adaptation.