If you're looking for manga similar to Pact, you might like these titles.
The fictional Japanese city named Sugomori City is built on reclaimed land. But as the years go by, the city's population is decreasing. One day, Sonosaki tells her classmate Katsuhira: "You have been selected to be a Kiznaiver." The Kizuna System, which allows Katsuhira to share his wounds, connects him to the classmates whose lives and personalities completely differ from his. The Kizuna System is an incomplete system for the implementation of world peace that connects people through wounds. All those who are connected to this system are called Kiznaivers. When one Kiznaiver is wounded, the system divides and transmits the wound among the other Kiznaivers.
After a series of catastrophic earthquakes devastate the nation of Japan, lives are left completely shattered. But that's only the beginning of the nightmare. How can the survivors sustain hope as they watch their country sink into the sea all around them?
A new government project is starting, where former convicts are relocated to towns without the knowledge of the citizens who live there. The trial city is Uoboka, a small town that was once a busy seaport. Now, 11 former violent criminals are being relocated to the town, and the only ones who know are the mayor and his friends. What could go wrong?