Tensai Family Company

Katsuyuki, a gifted but petty and egocentric high schooler, aspires to s쳮d in the high finance world. His well-ordered life is disrupted when his mother remarries his arch-nemesis, a free-spirited travel writer who is pleasant, unproductive, and unpredictable. This new family member's son, who bears a striking resemblance to Katsuyuki, is the complete opposite of him in every way. As the son's carefree and joyful nature begins to subtly contaminate Katsuyuki's entourage, Nagasawa, the high school's resident genius and the only person Katsuyuki holds in high esteem, starts to distance herself. Frustrated and resentful, Katsuyuki desperately seeks a way to expel this alien family from his life and is not above using spite to achieve his goal.