1boy, 1girl, bad_pixiv_id, bed_sheet, black_one-piece_swimsuit, body_markings, breasts, cellphone, cleavage_cutout, clothing_cutout, colored_skin, fate/grand_order, fate_(series), fujimaru_ritsuka_(male), grey_skin, highleg, highleg_swimsuit, horns, ibuki_douji_(fate), ibuki_douji_(swimsuit_berserker)_(fate), ibuki_douji_(swimsuit_berserker)_(first_ascension)_(fate), large_breasts, lying, on_back, on_bed, one-piece_swimsuit, oni, oni_horns, phone, pink_headwear, pink_one-piece_swimsuit, pov, smartphone, swimsuit, torayotorayomonekonouchi, two-tone_swimsuit, visor_cap, whistle