Teenagers often make elaborate plans for summer vacation.

While most fail to follow through, the students of Stella Academy were remarkably disciplined, sticking to their schedules. Baek Yuseol, however, was the exception.

"Oh right, I was supposed to do strength training tonight."

Swinging a wooden sword in the training hall, Yuseol suddenly remembered he hadn’t done proper weight training in days. He had intended to dedicate at least two hours every evening to it.

Lately, though, he had come to a realization: once a body reached a certain level of physical growth, it inevitably hit its limits. Human strength couldn’t …