Guys where is the manga about their parallel universe?? I can't find

http://www.mangago.zone/read-manga/sungeki_no_kyojin/

This one maybe ?

No. I have seen many people screen shots like they are in highschool levi is cleaner or something, mikasa being emo girl...

http://www.mangago.zone/read-manga/shingeki_kyojin_chuugakkou/

İt should be this.