horror or mystery with characters that are smart and observant?

Sachi-iro no one room

try
http://www.mangago.zone/read-manga/imawa_no_kuni_no_alice/
http://www.mangago.zone/read-manga/prison_lab/
http://www.mangago.zone/read-manga/death_note/
http://www.mangago.zone/read-manga/funouhan/
http://www.mangago.zone/read-manga/yuukoku_no_moriarty/ 
http://www.mangago.zone/read-manga/u12_under_12/
http://www.mangago.zone/read-manga/mystery_to_iunakare/

Hm
http://www.mangago.zone/read-manga/mystery_to_iunakare/
http://www.mangago.zone/read-manga/ouroboros/
http://www.mangago.zone/read-manga/change_the_world_kanzaki_yuuya/
http://www.mangago.zone/read-manga/tomodachi_game/
http://www.mangago.zone/read-manga/liar_game/
http://www.mangago.zone/read-manga/again_kang_full/
http://www.mangago.zone/read-manga/signal_100/
http://www.mangago.zone/read-manga/this_man/
http://www.mangago.zone/read-manga/funouhan/
http://www.mangago.zone/read-manga/shen_ze/
http://www.mangago.zone/read-manga/yuureitou/
http://www.mangago.zone/read-manga/monster/
http://www.mangago.zone/read-manga/boku_dake_ga_inai_machi/
http://www.mangago.zone/read-manga/the_planet_walks_alone/
http://www.mangago.zone/read-manga/shinrei_tantei_yakumo/
http://www.mangago.zone/read-manga/koroshi_ai/
http://www.mangago.zone/read-manga/american_ghost_jack/
http://www.mangago.zone/read-manga/yuukoku_no_moriarty/

Kusuriya no hitorigoto is a mystery genre with a smart observant fl

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