Sakura dē [Rewritten]

Mati Hakumi and her younger twin brother Mata are whats called "immortal teens". They have lived for 269 years but are 16, their parents had been killed in an ambush 100 years ago when they were trying to separate them. Having been on their own and nobody to tell them what to do they were happy... Until a year ago when Mata went missing. Now in the present Mati starts looking for her lost twin brother and goes through a lot of strange obstacles along the way.