Bloody Sugar wa Yoru Warau

Overview

A strange disease that preys on people's negative emotions called negativirus has been sweeping the town of Dusky Dusk. Different varieties have varying symptoms, but most people can't even see them. Luckily, the cool and collected Church and his brother, the hotheaded Jed, can, and they've made it their mission to fight back as specialists against this mysterious affliction and save patients' lives. But they also seem to be on the hunt for a specific negativirus strain that may help their beloved young sister, Basil...! Don't miss this dark, sweet fantasy from rising star author Matsuri Midou! (Source: Emaqi) Note: Includes one extra chapter.

Source: AniList