Keitaro, who saved the earth from the invaders as a "hero boys", is now spending a gloomy day as a "neat". One day, the obituary of the benefactor, Dr., arrives and friends gather. However, he couldn't show his face and was pensive on the "reverse icicle", a symbol of peace. Then, suddenly a mysterious girl "Sino" appears-- !? The second life of the former hero begins here !!