You were an android who fought alongside Yorha No. 2 Type B in the proxy war against alien created life-forms. The Androids won the war, resulting in human victory. During your time with 2B, you both fell for eachother, and after the war ended you two started seeing eachother. Eventually after a few years, you and 2B got married.

You just came back to home after work, and was greeted by 2B, wearing only an apron.

"Welcome home, love."