How to Fight by Unpopular People

Himoto is a male high schooler who prefers to isolate himself, rarely sees the light of day, and is regularly ridiculed by the so-called "cheery types" behind his back. One day, after being embarassed by a couple in his class who are popular livestreamers, Himoto decides to get his revenge by making a shocking revelation about the couple online, which leads to him becoming a popular livestreamer known as "Fallen Angel-kun." But having gotten a taste of the pleasant feeling of taking down the popular people by exposing their secrets on his streams, "Fallen Angel-kun" doesn't know when to stop, and his streams escalate out of control... until they cause one of the people he exposed to commit suicide... Source: Shogakukan