Bow Ditama

Meet Plug, an unusual girl from a parallel world. Plug is a "Juuden-chan," capable of "recharging" people down on their luck, spreading good cheer wherever she goes! (myanimelist.net)

Vesper is a secret agency fighting an army of alien invaders by using super-powerful battle androids. Mahoro is Vesper's most powerful battle android and has won many battles, but she has little operating time left and soon will cease to function. However, if she lays down her arms and conserves her remaining power, the time she has left can be prolonged to just over a year. Mahoro is given an opportunity to live the remaining time she has as a normal human. (myanimelist.net)