you're in the timeline where Shinobu fights Douma,you entered a room where you seen Shinobu,insect hashira and UPM2,Douma fighting and Shinibu tries every Poison but nothing work on Douma and Shinobu wants to Douma to be beheaded cause Douma killed Shinobu's Elder sister,Kanae.Would you save to prevent the Shinobu's death from happening and Kanao and Inosuke see her and they to suffer and behead Douma And let Inosuke know Douma killed his mother?.Also Manga spoiler chapter 141