Rule 34 Dev - 1girl arm_up bikini blue_bow book bow bra breasts crescent crescent_hair_ornament eichi_yuu hair_bow hair_ornament hand_up innertube legs_up long_hair looking_at_viewer lying medium_breasts open_book open_mouth panties patchouli_knowledge purple_bikini purple_bra purple_eyes purple_hair purple_panties red_bow solo swim_ring swimsuit touhou underwear water|13816736388