Suggestions

i dnt know what u mean by "opposite". there's opposite in personalities or looks. But i'll suggest some anyway

opp in looks:
http://www.mangago.zone/read-manga/hoppe_ni_himawari/
http://www.mangago.zone/read-manga/hinekure_chaser/
http://www.mangago.zone/read-manga/shitteru_yo/
http://www.mangago.zone/read-manga/kaeru_no_prince_sama/
http://www.mangago.zone/read-manga/sayonara_alpha/
http://www.mangago.zone/read-manga/shishi_mo_kobamazu/
http://www.mangago.zone/read-manga/ashita_mo_koko_de_aou/
http://www.mangago.zone/read-manga/never_understand/?av=2
http://www.mangago.zone/read-manga/lucky_number_13/

opp in personalities:
http://www.mangago.zone/read-manga/negative_kun_to_positive_kun/
http://www.mangago.zone/read-manga/neon_sign_amber/
http://www.mangago.zone/read-manga/star_like_words/
http://www.mangago.zone/read-manga/udagawachou_de_mattete_yo/
http://www.mangago.zone/read-manga/konna_otoko_wa_aisareru/
http://www.mangago.zone/read-manga/caramel_honey/
http://www.mangago.zone/read-manga/ringo_ki_kara_ochiru/

THANK YOUUUUU