Recommendations, please~ ヾ(☆▽☆)

i'd definitely check out harada's works, they have a good dark theme to them, here's some that I recommend
http://www.mangago.zone/read-manga/gintama_dj_me_yami_otoko/
http://www.mangago.zone/read-manga/nii_chan_harada/
http://www.mangago.zone/read-manga/color_recipe/

Sorry, following

Is it ok if its not yaoi ? If so: http://www.mangago.zone/read-manga/tomodachi_game/
http://www.mangago.zone/read-manga/aku_no_kyouten/
http://www.mangago.zone/read-manga/bastard_hwang_youngchan/ (in this one the mc is kind of a bad person and knows it so he tries to change)

100% Alright if it's not yaoi ヾ(❀╹◡╹)ﾉ~