Located in the biodome is a large open play area centered around a large pond. A large, modular racetrack surrounds it, where obstacles and layout can be changed via a panel at the entrance to the area. A motorpen contains a set of personalized gokarts for each member of Heart Soldier Senshi, based off of their aibou and colour-coded according to their position. These gokarts, upon encountering water, will automagically henshin (t/n: henshin means metamorphify) into bumper boats.

A minigolf course winds throughout the area, with an entirely customizable course - though the standard course is a set of themed holes based off every room in the Heart Soldier Senshi dorm, ending with the hardest challenge - the Hot Spring Volcano Base.

The entire area is circled by a slowly drifting river, which comes with complimentary inner tubes for drifting by while everyone has their fun and excitement. Don't forget to put them back where you got them when you're done! And be careful not to activate the Raging Rapids Turbo Race while people are like, lazily drifting or something!