
You could try reading the Kokoro series by Kanda neko, it's the fluffiest yaoi I know :3
Here's da link, hope it works ^.^
http://www.mangago.zone/read-manga/kokoro_kanda_neko/mh/c001/1/

I haven't read this one in a while, but I recall it being pretty fluffy
http://www.mangago.zone/read-manga/yuuwaku_recipe/mf/v01/c001/1/

Well if you want ultra cute and fluffy:
http://www.mangago.zone/read-manga/puchi_puri/
http://www.mangago.zone/read-manga/kimi_note/
http://www.mangago.zone/read-manga/konbini_kun/
http://www.mangago.zone/read-manga/kaeru_no_prince_sama/
http://www.mangago.zone/read-manga/yukemuri_journey/
http://www.mangago.zone/read-manga/twinkle/
http://www.mangago.zone/read-manga/fan/
http://www.mangago.zone/read-manga/kono_ore_ga_omae_nanka_suki_na_wakenai/
http://www.mangago.zone/read-manga/nekoka_kareshi_no_ayashikata/
(This is actually kind of smutty, sexy yet beautiful and sweet)
http://www.mangago.zone/read-manga/nise_x_koi_boyfriend/
http://www.mangago.zone/read-manga/hana_to_usagi/

This is a really good one that's really similar with this manga. Both have a sadist seme and "ugly" uke that's actually really cute! http://www.mangago.zone/read-manga/aitsu_no_daihonmei/
does anyone know other stories like this? or a story where both the seme and uke are not hurting each other but they are honest and just cute?