These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Deco likes to get...touchy...with Lunchbox, who doesn't seem to enjoy it particularly much... (though she might just be embarrassed because on both of those occasions the White-Haired Devil happens to be watching). On the other hand, they seem to be very close friends, and have some cute moments.
There's also this comic (warning - somewhat NSFW due to nudity) which has Deco extremely close to Fussy Britches' naked breast.