Recommend

https://www.mangago.me/read-manga/a_bad_example_of_a_perfect_curse/

ennead

https://www.mangago.me/read-manga/the_mountain_branches_dream_of_goblins/

https://www.mangago.me/read-manga/love_in_orbit/

https://www.mangago.me/read-manga/honey_trouble/

https://www.mangago.me/read-manga/what_s_with_this_strange_dream/

https://www.mangago.me/read-manga/how_to_be_the_chosen_one/

https://www.mangago.me/read-manga/tiger_and_tiger_gourd/
https://www.mangago.me/read-manga/tell_me_your_wish/
https://www.mangago.me/read-manga/anti_p_t/
https://www.mangago.me/read-manga/retirement_not_love/

Since idk if u want bl or straight, here's some non bl:
https://www.mangago.me/read-manga/a_true_knight_does_not_blindly_follow_money/
https://www.mangago.me/read-manga/trash_of_the_count_s_family/
https://www.mangago.me/read-manga/honey_i_m_going_on_strike/


You can also just search "red hair" on the tags