Rule 34 Dev - 2girls blue_hair blush bokutachi_wa_benkyou_ga_dekinai crossover embarrassed female female_only fin_ears fins green_eyes groping mermaid monster_girl multiple_girls purple_eyes red_hair rosario+vampire seashell_pasties takemoto_uruka_(bokuben) tamao_ichinose tanline tanned tanned_skin topless topless_female yuri zronku|5926589704