Any mangas where one of the main characters gets hurt?

there's tons of those! Are you looking for something more specific like shoujo? Yaoi? Shounen ai?

Shounen ai (⌒▽⌒) sorry for not being specific

http://www.mangago.me/read-manga/seduction_against_seduction/
(Uke gets hurt physically and emotionally. Has both shounen ai and yaoi elements)

http://www.mangago.me/read-manga/geu_kkeute_issneun_geos/
(this is a truck load of FEELS AND everyone gets hurt, either physically, emotionally or psychologically)

http://www.mangago.me/read-manga/a_man_like_you/
(Both mc gets hurt emotionally/physically)

http://www.mangago.me/read-manga/la_esperan_a/
(THIS RIGHT HERE IS FEELS/HURT CENTRAL. The emotional roller coaster is intense in this one)

http://www.mangago.me/read-manga/saiyaku_wa_boku_o_suki_sugiru/
(Uke and Seme tied to fate/curse and must stick together to avoid getting killed/hurt)

Start with these! I hope you enjoy your little heart out~

(●'◡'●)ﾉ

Thank you!

You're welcome(≧∀≦)