Kasane is an unobserved masterwork, lightning in a bottle, one of the most hauntingly beautiful and devastatingly horrifying character dramas ever put to pen and paper, in literary work or manga all the same. Both beautifully composed through the dark depths and radiant highs of the characters and their dialogue and paced so desperately that a cold sweat forms in the reader, begging "Just one more chapter. Just one more volume" till its sudden spectacularly dire conclusion, Kasane is apologetically, ruthlessly, stunningly haunting. This manga will make your heart race, your brow sweat, your soul ache, and your blood boil. The sheer gravity of the tragedy, a train wreck in slow motion, all beautifully exposed on the page as it is on the stage, will leave you hollow, gasping for more as if it was the air that you breathe.
There is nothing I could recommend more than that you read Kasane, all at once, because once you start, you won't stop till you crash headlong into the ending.