Alternative Name: Hot Spring Planet

Genre(s): Comedy Ecchi

Demographic: Shoujo Ai

Summary:
In a certain star system, there is a small planet called the Onsen Planet. The entire surface is covered in hot springs, and the ones who manage them... MORE In a certain star system, there is a small planet called the Onsen Planet. The entire surface is covered in hot springs, and the ones who manage them are the 4 Santa Monica siblings. HIDE