The 6-foot-9 Agau, who will arrive on campus this summer and be a freshman next fall, had eight points, five rebounds and eight blocked shots in the title game, a romp over Papillion-La Vista 69-44.
Agau has six of the blocks in the first quarter as Central raced to a 33-12 lead.
It was the fourth consecutive championship for Central, while Agau became the first player in Nebraska history to start in four straight A title games.
As a senior, Agau averaged 12 points and seven rebounds a game for Central (31-4). He had 16 points, 13 rebounds and 14 blocks in last year's title game.
He's the second future U of L player to win a title after Shaqquan Aaron – a 2014 commitment – led Seattle Rainier Beach to the 3-A Washington title last weekend.