Shunga Youkyu-Aneki
This drawing is a pun on the first part of her name. Shunga literally means "Spring picture", with Spring being a code for "sex". The pun here being swapping out the character for Spring (春) with the other seasons, and changing her clothes to match the season's weather.Natsuga Youkyu-Aneki
Summer Picture Request SisterAkiga Youkyu-Aneki
Autumn Picture Request SisterFuyuga Youkyu Aneki
Winter Picture Request Sister