Hi Tibault!
I'm on my first walkthrough, everything's looking good and I'm enjoying the story right now!
I've found a bug :) Adam appeared unexpectedly in the story (one of the phrases from this episode: "Adam gets up to greet us, and Kaz drapes an arm around his shoulder") My current set of LIs is Kazuki, Chris, Seth, James. I've made three choices on the island. All of them were Kazuki-centered :D I hope that'll help.