helpp

ok so which bl manhwa was it where there were 2 twins .. brother idkk so like one of the twins was in an arranged amrriage with an alpha cos he was a sepcial omega or smnn like that but he ran away and so the mc(other twin /brother idk) got sent to him instead and yeah he was told by the older brother of the seme to keep it a secret yada yada and they develop a bond ..i dont remember much after that （/TДT)/