Like many other commenters, I tried Eternum for its sexy content, but am definitely sticking around for its rich story and stunning artwork. The music, images, and animations are top-quality, the relationships are really wholesome, and the slowly unravelling story of Eternum is definitely holding my interest to the point I'm no longer playing for the sex scenes (though they are a welcome distraction)!
This game is definitely worth slinging some money at (and sling money I did)!
Thanks for a great visual novel, Caribdis! Looking forward to seeing where this goes! (And once I finish playing through 0.5, I'll definitely be taking a look at Once in a Lifetime, too!)