Oreshika can get a bit repetitive if you focus on the wrong things (like i seem to naturally do). If you focus on pushing forward the main story and just generally have fun building a clan and exploring the dungeons, i think you'd be fine -- building a clan definitely gets addictive, and based on the forums I've read, most people take it far, far more seriously than I do. Still, at $20 it's a steal no matter how deep it gets its claws into you. (I'm currently on break from it, but not from lack of liking it).
Conception 2 really depends on what you're liking about the demo. If all the system concepts appeal to you (3 teams of 3 kids of different classes! chain gauges! make tons of secret skills! positional battle!) it's worth noting that auto-battle works better throughout the game so those systems are ultimately (sadly) unnecessary. I found the game an absolute grind in the purest sense of the word -- autobattle after autobattle, clicking through conversations, autobattle after autobattle, clicking through conversations, braindead dungeon design, trying to get random events to show up, etc. If, however, you like dating all those girls and hearing background story, then someone else should comment since i was on auto-click during that stuff. There is simply nothing engaging about the dungeons whatsoever because the game was improperly balanced and gives you absolutely no reason to use skills, worry about weak points, or do anything but autobattle. I wasn't even overleveled based on online recommendations (which I checked)... in fact, if anything i was underleveled though i don't understand how anyone could have needed higher level characters).
That said, i really thought i was going to like it a lot based on the concept of creating 'teams' with secret skills and all the cool gauges and stuff in combat. in fact, my early reviews said just that -- i was enamored with all the varied systems. it's just that i never, ever had to use any of that stuff in actual combat.
