Shirotsume Souwa -Episode of the Clovers-

Tokyo, year 2008.
There is a mysterious group that experts from various fields gather. And Souji is the most outstanding researcher in the group, who researches about combat androids. He has produced three androids, Ema, Sayu and Toka. They adore Souji, and live a peaceful life. But one day, combat robots invade into his laboratory, and the battle to the end starts....