HELP ME FIND A BL MANHUA (DANMEI ADAPTATION)

i remember read something like the uke is suffering bcs of the ml and the uke die out of ilness (i think its cus of cancer?) and then he transmigrated to the past and became a doctor. when he meet the seme, he realise the seme also transmigrated bcs the seme k!ll himself after the uke died.

pls i want to re-read it if anyone remember （/TДT)/