1boy, abs, bed, black_hair, blanket, brown_eyes, dress_shirt, fate/grand_order, fate_(series), looking_at_viewer, male_focus, muscular, muscular_male, one_eye_closed, open_clothes, open_shirt, pectorals, saitou_hajime_(fate), shirt, short_hair, sitting, sleeves_rolled_up, sunlight, twitter_username, under_covers, white_shirt, yaekaidou