OH MY GOD GURL CHILL TF OUT HAHAHAHA IF YOU WERE IN KOICHI'S PLACE U'LL DEFINITELY FEEL HOMESICK DESPITE HAVING CAIUS BY YOUR SIDE, NO?
He knows that his mom is dead, in his reality she died for him, if he stays in this world his mom would've died for nothing, and his conscience wouldn't let him do that. Cut him some slack, it's not like he really wants to leave Caius...
ISTG MY HEART ACHES FOR CAIUS SINCE HE DID SO MUCJ FOR HIM also I lowkey don't like my toxic household so maybe that's why it's hard for me to really relate to koichi ┗( T﹏T )┛
Like wdym you love him when YOU'RE LITERALLY LEAVING FOR NO GOOD REASON YOUR MOM IS DEAD PERIOD NOTHING IS CHANGING THATT OMGGG ♂♂♂♂