"Can he aim his serve this accurately all the time?" Kawaki asked the old man, inquiring about Yuki's ability.
"Oh yeah, he can do that consistently every day," Sekine replied, the grin on his face likely the widest anyone had ever seen on the old man. "He achieved this with a creative training regimen he devised by himself, even before he met me. That boy's brain is something else."
After hearing the explanation about the self-training method Yuki developed, Kawaki was left jaw-dropped in disbelief. Even though such training methods for improving serve control were common among professional teams, Yuki's ability to think of it himself demonstrated his intelligence.