Toru recalls his life in the 1960s, when his friend Kizuki killed himself and he grew close to Naoko, Kizuki's girlfriend, and another woman, the outgoing, lively Midori.
A middle-aged office worker encounters aliens and is gifted with alien technology and limitless powers.
Story continues with the students' own conflicts, Koro Sensei’s identity and the fate of the world. The time limit for assassination is approaching.
