On a crowded morning train, Saito Kujou worked up the courage to help a handsome high school boy named Rei Hoshina, who was being assaulted by a violent man. Even though he was scared, his kind nature pushed him to step in.... more>>

After that incident, a secretly recorded video of the scene went viral, turning Saito into something of a school celebrity. Things started to look up—he even began growing closer to his beautiful seatmate and classmate, Rinna Nishino, the most popular girl at school.

At the same time, he became friends with Rei, the boy he rescued on the train, and they started hanging out.

But then… everything took an unexpected turn. <<less

Amid a world war, with his awakening to powerful special abilities (Soul Armor Abilities), Kamiya Yuusuke, conscripted into the military at the age of 10 due to this newfound power, continued to achieve numerous victories on the challenging battlefield. As a result, at the age of 15, he held the position of Brigadier General.... more>>

Despite traversing battlefields worldwide, he finally managed to return to Japan. The joy of returning home was short-lived, as news of an underage boy in the military started to leak to the public. In response, the military high command ordered Yuusuke to attend a military school called the Special Operations Soul Armor Academy and undergo a revision of his military records.

Yuusuke, secretly pleased at the prospect of reclaiming his youth, faced numerous troubles, whether due to the nature of the unique school or perhaps because he had been in constant battle since childhood. What will happen to his relationships with strong-willed girls such as his half-silver-haired childhood friend, the older sister officer who is his work partner, and the tsundere honor student of the same age? <<less