Ecchi Mery and the Perils of the Cosmic Shrine!

Ecchi Mery and the Perils of the Cosmic Shrine! is an adult JRPG made using the RPG Maker toolkit. It is set during an indeterminate point in Earth's past when Japan was known as Cipangu, but also contains elements of fantasy such as magic and monsters. The player controls Mery, the only child of a wealthy British family who attends a magic academy. To complete her graduation and prove her worth to her teachers, Mery decides to embark on a quest to Cipangu with her maid, Mary, to recover a valuable artifact from Mary's hometown, Hinaya village. After arriving in Hanaya, the two adventurers soon learn that if they truly want to make any progress in dealing with the horny locals and the monsters guarding the artifact, they'll need to use their sexual prowess just as much as their skills in combat.

The game features combat where the player and their enemies take turns performing actions, such as attacking, using skills, or items. Defeating boss enemies awards experience points which can be used to upgrade Mery and Mary's statistics by visiting specific objects or NPCs. Defeating regular enemies sometimes awards items which can be synthesized at a special village shop to create more powerful equipment and items. The game contains 30 H-scenes and features voice acting for Mery and Mary.