unto: a word used to show love and respect by one opa to another opa, often said by cp to opa , a word in short to tell that person u will never betray him, ill always be by ur side, love and respect, nice person
In korean 'sa' means 'die', 'rang' means 'together' and 'hae' means 'do/doing'.
Saranghae literally means let's die together, let's live together until we die.