Though You May Burn to Ash

Though You May Burn to Ash (たとえ灰になっても, Tatoe Hai ni Nattemo) is a manga by Kakashi Oniyazu. It began its serialization in the Young Gangan manga magazine in December 2015. Yen Press has licensed it for release in English.

Plot
Ryouma needs one billion yen for his terminally ill sister--but instead of a loan, he loses his life! Now he's stuck in Limbo with a sadistic angel named Kroel and four other victims of fate. If he can gamble his way to the top, he might just escape with both his life and the money he needs to save his sister. But if he fails, it's ashes to ashes, dust to dust--for all eternity!