oikawa's's manga / #Ikemen seme(3)

I am confused for some reasons. How did Hirose learned about Sudou's background? Why does he knew about the gsw? Is he an ex-assasin since both Sudou & Hayashi keep having the same impression? I think its a huge plot hole. I really like the art and the theme but those questions quite bother me and gave an incomplete feeling after reading a completed manga....

Deserve better rating for reaaallll i have read this in mrm i guess when the time mgg was down hahahaha

Actually forgot how was this lols but i think it was quite good since the plot is not fast pace