Fuji no Yamai Anime Details and Episodes Byakuya had an incurable undying illness, which means he couldn't die. Gin, his best friend, made a promise that he would take care of Byakuya until death… Series info Watch free DetailsFormatMangaStatusFinishedSourceOriginalCountryJapan GenresDramaRomance TagsBoys' Love RelatedShokubutsu Zukan (Related)Mister Mermaid (Related) RecommendationsxxxHOLiC Rei