Rule 34 Dev - 1boy 1girl arms_up ass blue_theme blush breasts comic fate/grand_order fate_(series) fujimaru_ritsuka_(male) glasses hand_on_own_chest highres koyuki_(kotatsu358) large_breasts mash_kyrielight monochrome one-piece_swimsuit open_mouth school_swimsuit school_uniform speech_bubble swimsuit swimsuit_under_clothes undressing|19028895561