When he was 16 years old, Tsushima Keiji made a promise to his younger brother that he would definitely change the Tsushima family.
It took him four years to become the head of the Tsushima family, and to revive and change the Tsushima family.
The Tsushima family is already their ideal Tsushima family.
But he couldn't find his brother.
While searching for his younger brother, he suddenly fell into a parallel world, a world where he died early and his younger brother was about to commit suicide by jumping off a building.
Intention: redemption, family affection, love