the story is not bad, i am just irritated that kazami and itami's first name (youji) became their family name,.
the grammar has small mistskes but its ok
Wow I haven't explained
actually (Youji) is not Kazami's surname. but first name.
but because Itami and Kazami had almost the same name. I ended up changing (Youji) to his second surname.
their real name is.
Itami Youji
Kazami Youji
Kazami Kazuki.
even so, Kazami and Utami were not siblings.