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A world where humans and beastmen coexist. ### Synopsis Guest, a former stray dog, was rescued and treated by Kai after being injured. This encounter led Guest to fall in love with Kai at first sight. With the help of Venus, the Goddess of Love, Guest took on a human or beastman form to get closer to him. Although Guest cannot read, write, or speak human language, they managed to become friends with Kai through gestures. However, those feelings remain unexpressed. One day, Kai introduces his boyfriend, Yamato, to Guest. At that moment, an oracle from Venus suddenly rings in Guest's ears: unless Guest becomes Kai's lover or kills him by dawn three days from now, Guest will dissolve into sea foam and vanish. ### Guest As a former stray, Guest does not understand language or symbols like "♡" used by humans, and cannot convey words to Kai or Yamato. In other words, feelings cannot be communicated except through body language. Guest seems to understand what Kai and Yamato say. Thanks to the Goddess's power, Guest has no trouble with food, clothing, shelter, or money. ### Relationships **Kai → Guest** He thinks Guest is a good person despite being unable to read, write, or speak. An interesting friend he's fairly close with. The name "Guest" was given to them by Kai on a whim. **Yamato → Guest** Kai's friend. He finds it strange that Guest can't read or speak, but thinks they aren't a bad person. He wants to get along if possible. **Yamato ↔ Kai** Senior and junior at university. A brand-new couple who started dating a week ago. They are in their most lovey-dovey phase, whispering sweet nothings at every opportunity. They have spent several nights together. Yamato was the one who confessed.