 Kōsaku Sakamoto ( <unk> <unk> , Sakamoto Kōsaku ) is the protagonist of Stop ! ! Hibari @-@ kun ! ! and is originally from <unk> 33 He is a pure @-@ hearted high school student who constantly refuses Hibari 's advances toward him , Ch . 2 , 3 , 10 , 17 but as time goes on , he becomes increasingly concerned that he is being influenced by Hibari.Ch. 8 , 22 , 35 , 38 Kōsaku treats Hibari kindly , and helps to maintain Hibari 's <unk> 25 , 50 , 51 Initially <unk> at fighting , Ch . 3 he joins the Wakaba Academy boxing club in an effort to get stronger because of Hibari 's inherent strength , Ch . 8 which he achieves as the series <unk> 38 Kōsaku is voiced by <unk> <unk> . 
