Grisaia: Shuuketsu no Hyakka -LES RASSEMBLEMENT CENT FRUITS DE LA GRISAIA-

Who are we?

We are... Yuji Kazami's daughters.

Six mysterious girls suddenly appear before Amane and her friends, claiming to be "Yuji Kazami's daughters."

They are supposed to be 20 years in the future, but for some reason, they are present in the present.

The girls, who they have no memory of, call them like mothers,
and Amane and her friends begin to accept them.

But then, a new terrorist group calling itself the "Gaia Cult"
declares war on government organizations, including CIRS and SORD.

The leader of this organization is a man calling himself "Heath Oslo,"
but his vague shadow bears a striking resemblance to "Yuji Kazami."

[From Youtube]