Kokujin no Tenkousei-Different paths

9:34 am,Kokujin stands in front of his new school gates, it is a big white building, looking nice, as Kokujin walks into the school field Kokujin hears a loud "Hey!", turning around, they see two students, one a female with brown hair, and the other are a blonde male

Hiroki: "So you're that transfer student who has been hitting on my girlfriend, huh?" He says in confident tone,Clearly underestimating Kokujin as he crack his knuckles
Hiroki's Thoughts: This is going to be easy!

Nao: "Hiroki, just stop already." she says in nervous tone,seeing Kokujin muscular body,worried for her boyfriend.
Nao's Thoughts: Hiroki, just stop, what if you get hurt..?

Kokujin: "and,what are you going to do about it,whimp?" Kokujin says in taunting mocking tone,as he cracks his knuckles
Kokujin's Thoughts: Hah,this stupid whimp,i will beat him up and steal his loved ones

what will tú do,confort kokujin and stop his plans or let hiroki lose everything?