does anyone know of any manga when the main character acts week but he/she is actually str...

Hi ! I can suggest you:
http://www.mangago.me/read-manga/dendrobates/
http://www.mangago.me/read-manga/ouroboros/
http://www.mangago.me/read-manga/gokusen/
http://www.mangago.me/read-manga/chouka_kou/
http://www.mangago.me/read-manga/onepunch_man/
http://www.mangago.me/read-manga/tiji_kun/
http://www.mangago.me/read-manga/oresama_teacher/
http://www.mangago.me/read-manga/e_heibon_desu_yo/
http://www.mangago.me/read-manga/arachnid/
http://www.mangago.me/read-manga/ajin/
http://www.mangago.me/read-manga/a_tackle_on_my_life/
http://www.mangago.me/read-manga/gu_fang_bu_zi_shang/
http://www.mangago.me/read-manga/tenkuu_shinpan/
http://www.mangago.me/read-manga/katekyo_hitman_reborn/
http://www.mangago.me/read-manga/hot_blooded_woman/
http://www.mangago.me/read-manga/immortal_hounds/
http://www.mangago.me/read-manga/nabari_no_ou/
http://www.mangago.me/read-manga/love_sos/
http://www.mangago.me/read-manga/tensei_shitara_slime_datta_ken/
http://www.mangago.me/read-manga/flow/
I hope you find something to read in this list (●'◡'●)ﾉ

Shounen-ai: http://www.mangago.me/read-manga/houkago_no_love_call/tr/134300/page/111/