A chance I read this before...
Shirakawa is the top fighter at his school, but has little motivation for it, even with his two side kicks egging him on. Even when the new teacher turns out to be an alumni and never defeated in a fight, he still shows little interest. Until he sees an old video of sensei fighting and thinks he looks beautiful. After that, he sticks to sensei like glue
Haru Kakete, Uguisu