Shoujo Recommendations

How to Survive as a Maid in a Horror Game https://www.mangago.me/read-manga/how_to_survive_as_a_maid_in_a_horror_game/
Everyone Loves Her (Idk if this one is in mangago). FL isn't exactly the smartest, has her own flaw, but she's still in highschool (and not a profesional assassin) so it still make sense for me.

Try these:

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

https://www.mangago.me/read-manga/hero_killer_1/

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

https://www.mangago.me/read-manga/lv_99_princess_of_black_flame/

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

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

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

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

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

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

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

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

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

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

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

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