The first chap up to third chap is the past. Chap 4 when MC remembered their past, that's why he is terrified of the white haired guy. The white haired guy is the emperor but in different life. Then chap 7 and up shows the continuation of their past, also shows the root of mc's anger. Hope this helps.
Sorry for the bad eng.
Not surprised but still freaking disappointed. Don't hurt our baby(ᗒᗩᗕ)