So anyone knows a manga about a naive uke but when it comes to sex he is really naughty? I...

http://www.mangago.zone/read-manga/tadoru_yubi/

Maybe this, when he is drunk:
http://www.mangago.zone/read-manga/koi_o_suru_nara_kono_machi_de/

How could we forget our Aki, he's so naive, almost know nothing but so daring when it comes to sex. HA+
http://www.mangago.zone/read-manga/honto_yajuu/

http://www.mangago.zone/read-manga/hisho_ikuseichuu/
http://www.mangago.zone/read-manga/abiru_junjou/
http://www.mangago.zone/read-manga/room_share/
http://www.mangago.zone/read-manga/brother_ougi_yuzuha/
http://www.mangago.zone/read-manga/otona_keikenchi/
http://www.mangago.zone/read-manga/love_seeker/
http://www.mangago.zone/read-manga/kimi_wa_amai_amai/