San is a 10-year old lion. Kuriya is a 5-year old lioness. They live at Kumamoto Zoo and apparently have become smitten as they have produced three cubs. The cubs have not been sexed yet because the mother would maul to bits any volunteer who would volunteer to sex them. They will be sequestered until weaned; only then will we know.
Warning: the below photo is deadly both in cuteness and actual deadliness. - William