A retired astronaut travels to the world of "Kamen Rider 01" and becomes Hiden Orto.

The strongest president who is no longer funny and sticks to his own ideas, Kamen Rider Zero-One, is born.

(This is a newcomer's work, so there may be some shortcomings. Please bear with me.)

Sixteen-year-old Hachiman Hikigaya, after a strange memory emerged, has a new perspective on life. "Everyone is born at different starting lines." "Physical strength, brains, looks, emotions, and then money." "I deeply agree with the idea of ​​simply categorizing people as winners or losers." Determined to be a winner, he leaves behind Sobu High School and the Yukinoshita sisters and enlists in the arms of the private Hyakkaou Academy. Here, he'll participate in the game of power and gain. "Life is nothing but fame, money, power, and sex—I want them all!"... Jabami Yumeko: Hikigaya-kun, let's fall into the abyss together. Momobami Kirari: Hachiman, the Hyakko family needs you, I need you, please be my husband. Momobami Ririka: Do you like your sister instead of me? Juraku Sachiko: Be my dog~ Yukinoshita Yukino: Come back. Hachiman Yukinoshita Haruno: Don't overthink it, I'm doing this for Yukino! ...(Even if you haven't watched Kakegurui or Oregairu, you can watch it without any problems.)