Shin Chimoguri Ringo to Kingyobachi Otoko

A terrifying entity stalks the streets: a man whose head is a glass fishbowl. When he strikes, the goldfish inside leaps out to drain his victim's blood, irreversibly transforming them into a goldfish. High school student Kousuke faces this nightmare firsthand when his younger sister falls prey to the creature. Left with no alternative, he does his best to care for her in her new aquatic form, struggling to cope with a tragedy that has also claimed several of his classmates' loved ones. His desperate reality shifts when he encounters Ringo, an eccentric girl clad in a school swimsuit who carries an umbrella and wears a firearm around her neck. She is an apprentice "blood diver," using the gun to propel herself directly into the wounds of the fishbowl man's victims. If she reaches them in time, she can halt the transformation process. Ringo's mentor, Ichigo, reveals the existence of a rumored method capable of restoring those already turned back into humans. Fueled by hope, Kousuke resolves to aid Ringo in uncovering this cure, determined to save his sister and everyone else condemned to this watery fate. This story serves as a direct continuation of Chimoguri Ringo to Kingyobachi Otoko.