I guess even the ending is vague asf and left for interpretation, like the entire manga up to that point. Technically there's evidence for both Hashi surviving, while the "honest" part of him dies and Hashi dying literally, but it's very much open to interpretation. Tamaki exhausted over the railing, the flowers in an empty hospital room, sending his art to a publishing company so he gets noticed, Hanas comment, Tamaki and Hana talking about how Hashi used to be. Even Hanas comment how it's better to be unable to lie rather than disappearing completely could be taken as a comment on all of the patients rather than just Hashi himself. Though my personal interpretation is: surgery succeeds, what Hashi says is sincere, this time it isn't forced by his illness but of his own volition, a last sincere thought before he "disappears".
I guess even the ending is vague asf and left for interpretation, like the entire manga up to that point. Technically there's evidence for both Hashi surviving, while the "honest" part of him dies and Hashi dying literally, but it's very much open to interpretation. Tamaki exhausted over the railing, the flowers in an empty hospital room, sending his art to a publishing company so he gets noticed, Hanas comment, Tamaki and Hana talking about how Hashi used to be. Even Hanas comment how it's better to be unable to lie rather than disappearing completely could be taken as a comment on all of the patients rather than just Hashi himself. Though my personal interpretation is: surgery succeeds, what Hashi says is sincere, this time it isn't forced by his illness but of his own volition, a last sincere thought before he "disappears".