Cain and Abel.

Takada Yu is an employee of a development firm. His father has favored his high-achieving older brother and been indifferent to Yu since young. So Yu craves for his father’s love and wants his recognition somehow. Then one day, Yu encounters a woman. Although it was the worst possible meeting, he gradually starts to have romantic feelings for her through work and an unexpected development. But ironically enough, she turns out to be the girlfriend of his older brother. Yu begins to realize what he truly treasures and matures as a person as he struggles with this complicated romance and with his older brother and father.