Riku Rei summons Suigin after her father, Riku Yuuki dies, and hands him something that Yuuki apparently left for him. Though he is hesitant, Suigin accepts the item, which happens to be a specialized console to play the new game “Grave Buster.” On the console, Riku Yuuki left Suigin a message and one billion in inheritance and tells him to protect Riku Rei.
That's why I don't know 
anything about my father.
لهذا لا أعرف شيئاً عن أبي
Deshalb weiß ich nichts
über meinen Vater.
Por eso, no sé nada sobre mi padre.
Por eso, no sé nada sobre mi padre.
En fait, je ne sais rien de lui.
È per questo che non so nulla di mio padre.
É por isso que não sei 
nada sobre meu pai.
Поэтому я ничего не знаю о своём отце.