WHAT THE HECK IS GOING OOOOON. Does anybody have any spoilers...?

Isn't young black haired guy the "little flower" that went away, as mentioned in the beginning of the story? I'd sa the kids went through some traumatic shit together, and the protag forgot cause trauma

I feel like it’s probably some reincarnation stuff or something....because they look the same age but also the dark haired one sometimes has long hair..? I need answers T.T

i think the little flower is the girl's brother or something?, cause if you notice at the end of chs sometimes theres a guy who shows up with a flower on his head.

i think mc and black haired guy where in some kind of facility or something and then mc got taken away and might've lost his memories or something alike.