You aren't wrong, Eternum is the pinnacle nothing can come close for story/mystery/characters etc
Ripples is definitely second though. Love that game.
But I've played cosy like 5 times, it's great. Projekt passion, house in the rift, harem hotel, there's a few classics on that level, but like Eternum I really want to know the rest of the story with cosy cafe
Only complaint is misaki feels tacked on and takes away from the rest of the cast, wish we could skip her haha, and get Elizabeth and Annabelle finally involved or the main girls