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START-421 Aim for No. 1 in Japan with a modified tentacle creation: Tentacle-1 Grand Prix, Yuna Ogura
The battle to become number one in Japan using our own custom-built tentacles is the Tentacle-1 Grand Prix. It is a festival for engineers who compete by attacking female employees of rival companies with in-house developed tentacles and seeing how strongly they can react. They relentlessly target highly sensitive bodies, making them even more reactive, and push the excitement to the limit. Unstoppable waves of sensation keep building!
AvMates Insight
START-421 is one of 50 videos featuring Ogura Yuna (小倉由菜).
Her most frequent collaborator is the maker SOD Create, which produced about 78% of her total works.
For a full list of Ogura Yuna’s works, see the Ogura Yuna JAV playlist .




















Video Information
Release Date:2025-10-14
Product Code:START-421
Series:
