Rule 34 Dev - 1boy 1girl bikini blue_archive cardigan crossed_bangs doodle_sensei_(blue_archive) greyscale hair_between_eyes hairband halo highres kotatu_(akaki01aoki00) long_hair low_twintails monochrome multiple_persona sensei_(blue_archive) simple_background swimsuit turtleneck twintails ui_(blue_archive) white_background|23543108316