Ecchi,Shoujo ai,Comedy,Sci-Fi
🇬🇧English
Publication:Ongoing
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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. 
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Chapters(4)
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Volume 1 Chapter 4: Aqua's Recommendation! Onsen Specialty
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