Except for Hua Hua You Long...

http://www.mangago.zone/read-manga/sokonashi_freefall_romance/
http://www.mangago.zone/read-manga/partners/
http://www.mangago.zone/read-manga/paraphrase/
http://www.mangago.zone/read-manga/adult_na_kaihatsushitsu/ (but this one is horrible)
http://www.mangago.zone/read-manga/shinkai_no_venus/ (it's a sequel to Venus ni Seppun, so you may want to read that first)
http://www.mangago.zone/read-manga/cold_rain_of_happiness/

I'm not proud of myself (￣∇￣")

I think they do it in http://www.mangago.zone/read-manga/ropeman/

Thnx a lot :)))!! Gonna check them out now...

ヾ(❀╹◡╹)ﾉ~