On his first day at an all-boys school, Tooru Kouno becomes the center of attention due to his striking appearance. Frustrated by the lack of girls at his new school, he finds solace in the memory of a pink-haired girl he encountered earlier. As he settles into his dorm with the help of his classmate, Yuujirou Shihoudani, Tooru is surprised to meet Mikoto Yutaka, who bears a striking resemblance to the mysterious girl. To his astonishment, Tooru discovers that Mikoto is the same girl he saw, only crossdressing. Yuujirou reveals that they both participate in a school tradition where attractive first-year students, known as 'Princesses,' are chosen to boost student morale. Much to Tooru's disbelief, he learns that he has been selected as the third Princess by the student council due to his captivating looks.