Nanako Fujiwara, a socially isolated high school girl, remains an outcast even after transferring schools—until one day, her life takes a dramatic turn!

She’s unexpectedly tasked with a crucial mission: selecting the next heir of a powerful conglomerate (zaibatsu). To "accurately evaluate the candidates’ leadership qualities," she must live with four dazzlingly handsome brothers competing for the title:

Yamato Mitsurugi (Eldest):

Flawless Student Council President

Vibe: "Excellence isn’t my goal—it’s my default."

Shizumaru Tenhou (Second):

Undefeated Street Fighter

Vibe: "Try saying no. I’ll make you regret it."

Hikaru Sennen-zaka (Third):

Illegally Adorable Mascot

Vibe: "Nee-chan, let’s bake cookies!" (…Why is his stock portfolio outperforming Wall Street?)

Ukyou Sumeragi (Youngest):

Mysterious Beauty Incarnate

Vibe: "You keep staring… Do I haunt your dreams?"

The Catch: Each brother deploys every tactic imaginable—from sweet persuasion to corporate sabotage—to win Nanako’s favor.