Responses
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http://www.mangago.zone/read-manga/ore_no_doukyuusei_ga_binkan_sugite_yabai/ Harada version of fluffy
http://www.mangago.zone/read-manga/henai/ The Henai set are not 'innocent' per se, but not twisted either.
http://www.mangago.zone/read-manga/restart_harada/ There is a certain innocence here, though not in the same way. It's bittersweet, and not in the twisted way we expect from Harada.
The only/most innocent story Harada have ever made