So "shadows" are manifestations of things which people want be?
Yu Ha Na don't want see anyone die and want forget everything so Yu Ee didn't try kill her and don't remember anything. Shin Woo want have a friends so his "shadow" is more friendly. Probably Mi Rae "shadow" is more expressive...
Shortly, she asked him if he can feed family after that he told her child doesn't matter for him. Before his misleading speech she tried point out they age difference. Her face in the moment when he mention her child and next shot on her lips could mean she misinterpreted him.
Wtf? How that possible?
How could human burn of nowere after death?
Maybe that teacher don't hunt after shadows but people who wasn't killed by their shadows... I don't know