I'm reading it here: https://mangatoto.com/title/191005-emergency-youth-record-book
(Please keep in mind that agere and ageplay are 2 very different things, this story leans towards agere which is typically a coping mechanism for stress and trauma)
JP Version: https://mangatoto.com/title/190113-baburasete-motto
Official Version: https://mangatoto.com/title/184820-escape-journey-official
also read it here: https://mangatoto.com/title/127542-count-tachibana-official
I read it here first: https://mangapark.net/title/22305-en-bi-no-kyoujin
Bi No Kyoujin: Smoke: https://mangapark.net/title/85385-en-bi-no-kyoujin-smoke
Emergency! Youth Record Book