GlassDragon

Chie Ikeda sells insurance over the phone, rides her bike home through the same worn streets, and lives for her daughter Rin, a violinist with a future Chie never had. Then a doctor puts two tumors on a screen and gives her a year, optimistically. The job goes next. Then Rin tells her she is pregnant.

So Chie goes back to the one thing she was ever great at. A former champion named Saki pulls her into Valhalla, an underground fight club that runs on the bets of very rich and very dangerous people. Every win goes into an envelope with Rin's name on it. Every blow brings the end a little closer. And waiting beyond Valhalla is Ragnarok, a secret tournament where a fight ends only when the patrons are satisfied.