In the First Year of the Apocalypse, I Began to Grow Infinitely Stronger

"On June, XX, XX, I had just come to study in the American League, and the end of me came." "What a fool! You started a civil war just after the apocalypse broke out? Damn it, you lost the fight and announced the disbandment after only two days of fighting? Mad, America has become a chicken eating contest!" "On XX, XX, XX, an emotionless voice appeared in my mind. He said he would sign a contract with me to explore infinite derivative worlds." "You were forcibly teleported away before I could react? I haven't promised you yet!!!" There are apocalyptic survival and wasteland adventure, plus unlimited streaming, superpower upgrade + violent dissuasion + physical decryption