Rat Collective

In 2069 Japan, dominated by the colossal corporation GENNAI, Kyosuke, a young man living in the depths of poverty in a society where the gulf between rich and poor is widening, cannot come to grips with the suspicious suicide of his best friend, Yuya, an elite employee of GENNAI. Suffused in the emptiness of losing his friend, he encounters a strange talking mouse named Easy. The truth revealed to him and the mysterious power bestowed upon him cause the gears of Kyosuke's life to spin out of control. An unprecedented "super-sensory, awakening science fiction" begins!

(Source: Kodansha, translated)