Nana to Kaoru is about Kaoru, a BDSM loving teenage boy, and his neighbour Nana, who discovers just how much she loves being dominated. It's a very sweet, wistful, romantic will-they-or-won't-they sort of deal that I'm super addicted to; scanlations are available on MangaTraders, but this is a pretty representative page when I think of Nana to Kaoru being just crammed full of sfx and text boxes and words of every sort XD