The astronomical event "Apple Moon" occurs once every 300 years. On that day, Sakuma, while visiting the ocean with his classmate to observe the event, ends up meeting a parasitic alien instead...?
Story has potential if more chapters are released. It's hard to see where the story could go, but it definelty can become something good. I swear man these interspecies romance manga are just too good. In 12 chapters, a lot of solid characters have been introduced which I find pretty nice. We get some depth to the mc not that much but still a bit. And we get a good understanding and development of the main heroine who's an alien. She's super cute btw. So yeah. Give it a try. Wish it had more chapters, but overall pretty nice