This tag is applied to images including the letter 'H'.
This may be someone's initial letter or the letter meaning "'Ecchi'.":http://tangorin.com/general/%E3%82%A8%E3%83%83%E3%83%81  Often seen in [[Suzumiya Haruhi no Yuuutsu]] images.

h4.  See also

* [[A (phrase)|]]
* [[Tag group:Text]]