Rule 34 Dev - 1boy 1girl black_hair blush book couple cup dress flower hair_spread_out hetero holding_hands hood hoodie interlocked_fingers jewelry kagerou_project key kozakura_marry long_hair necklace nishina_(alive001) petals red_eyes seto_kousuke short_hair silver_hair souzou_forest_(vocaloid) vocaloid|3979928043