i just knew that this manga is tohjoh asami's.

The mangaka is Akizuki Koh. But I also thought the cover resembles asami-sensei's artwork.

you're right. tohjoh asami is the mangaka, akizuki koh is the author. look here at the first page: http://www.mangago.me/read-manga/haginokouji_seiya_sama_no_ran/mf/v01/c001/