Taking a bath is a part of everyday life, and a large portion of domestic water consumption happens in the bathroom. Sometimes, it feels regrettable how water resources are consumed in such great quantities. A bathroom with an ecosystem design makes good use of water resources. This design can be described as forward-thinking and bold; when we shower, it's like being in the middle of a forest. One side of this ecosystem bathroom is filled with grass taller than a person, while underneath where one stands is a purification system that can clean used water for reuse. It's extremely water-saving. When taking a shower in such an ecosystem bathroom, people probably feel more cheerful, no longer facing empty walls on all sides.