Sasaki to Pii-chan

Sasaki is a 39-year-old office worker whose days have settled into a quiet routine with little ambition left in them, until he buys a small Java sparrow and names it Pii-chan. The bird can speak, is actually a great magician reincarnated from another world, and grants Sasaki both magic and the ability to travel between worlds.

Sasaki first uses this miracle sensibly, selling modern goods in the less advanced world and bringing home a comfortable profit. His careful plan collapses when he uses magic to save a woman who turns out to be a government agent hunting people with supernatural abilities. Suddenly he is a secret-agency employee, an interworld merchant, and a participant in magical and political conflicts, all while trying to preserve the peaceful life he originally wanted with his bird.