Responses
http://www.mangago.me/read-manga/15_meisetsu_kougyou_koukou_rugby_bu/ I kinda love this one, Its too short but I enjoyed reading it.
http://www.mangago.me/read-manga/eyeshield_21/ (at some part only hints of romance)
http://www.mangago.me/read-manga/noblesse/
http://www.mangago.me/read-manga/vagabond/
http://www.mangago.me/read-manga/xxxholic/
Iirc, there's a bit hint of romance, but doesn't develop as story progresses..
A very good or interesting manga. Anything is fine as long it doesn't have romance in it. Thanks ヽ(*´∀｀)ノ