lucky star
hiiragi kagami, hiiragi tsukasa, izumi konata, takara miyuki
kogaku kazuya
4girls, ahoge, blue hair, blush, bow, full-face blush, girl on top, hair bow, heavy breathing, lying, multiple girls, musical note, on back, pink hair, purple eyes, purple hair, ryouou school uniform, school uniform, serafuku, short hair, siblings, sisters, straddling, switch, trade, twins, twintails, yuri