Kagerou Daze, Vol. 9 (manga)

The bonds of family are pressed to their limits... When Kano, Kido, and Seto are taken in by the Tateyama family, their initial fears about being used as "research subjects" are quickly alleviated, and for the first time, they experience what it's like to have a real family. But the closer you are to someone, the greater the hurt of their betrayal...