In a dreamlike, nighttime-only space, you can view the little-known sexual sides of diverse creatures through illustrations and special tanks. It's packed with playful, adult-oriented ideas, including a sealed booklet given to all visitors.

Plenty of installations you can touch and operate.

Debuting for the first time are 「ビンビンBOX」, where you can experience how a male sea lion's reproductive organ works, and the 「“性”存 Probability Roulette」, which lets you feel the harsh odds from survival to reproduction in fish. You can also enjoy the popular 「もみもみBOX」, where you put your hand in to check the feel of “something from a living creature”.

Limited-edition goods are on sale, such as original condoms and room key holders featuring the room number "181," inspired by sex“full”.

At the in-house Tully's Coffee, a limited-time "Aquarium Cocoa" featuring illustrated motifs of the creatures appearing in the event will also be available.