Arrive at Kilimanjaro International Airport. You shall be met after clearing with customs and immigration, 

Transfer to the Arusha hotel for overnight.

Overnight at Mt Meru Arusha Or similar

After breakfast proceed to Ngorongoro arriving on time for Lunch. Afternoon at Leisure.

All meals and overnight at Ngorongoro Sopa Lodge Or similar (B,L,D) 

Breakfast at the lodge,  Collect Lunch boxes and drive to Ngorongoro descend over 600 meters to the floor of the crater for a crater tour. Explore the forest areas that are inhabited by monkey and elephant, the lake area, where you may see the flamingos and the open savannah where the lions hunt for food. Dinner and overnight at Ngorongoro Sopa Lodge Or similar (B,L,D)  

After breakfast, drive to Arusha for Lunch and Later transfer to Kilimanjaro international airport for flight back home.