they look like older yamada and kase (￣∇￣") ^^
i was kind of thinking that myself honestly however i think kase has a somewhat more rounded face
I think same author artist I'm not surw
this is incredible ...the Art is gorgeous with a captivating story ....just wow
i'm loving it (๑•ㅂ•)و✧
https://imgur.com/a/XcGWyLP