Azusa is amazing, especially the tanned version, also is there an actual canon lore as to why in doujinshis her being creampied heals her from the tans?
Technically the sister tag is wrong, she calls him onii-chan but she specifically states in the first doujin that he is a relative that she calls onii-chan, not that he is her brother. They appear more likely to be cousins as he called her father uncle