For Japanese manga, Shueisha's own digital store is a good place to look. They often release official digital versions of their manga.
: This is a and psychological survival manga written by Kurin Kubu and Nanairo Kasuga. The story follows five shipwreck survivors—three women and two men—who are washed ashore on a remote island. The narrative focuses on the clash between their survival instincts and their moral conscience, often exploring themes of love, hate, trust, and betrayal in an extreme environment. Essay: Rengokujima Kyokuchi Renai — Context and Chapter
Rengokujima Kyokuchi Renai (also known as "Boundary of Love" or "" in Japanese) often exploring themes of love