Awesome storyline. I love the setting in Tibet, it's actually refreshing to have such a contrasting environment from the usual dating sims. I also like the historical facts, the different steps you have to take to reach Iori's heart and also I loved the characters. They were very cute. ^^ Were the backgrounds actual photos from Tibet?
The only problem I have with your game is the debate system. It's a unique concept, but it's a bit too reliant on luck. I don't mind luck being a notable factor in a minigame-- problem is, the way your debate system works, every time your opponent wins, you lose health (it's not really health but I'll just call it that >_<) and your opponent gains health, and if you win you gain health and your opponent loses health, it progresses too slowly and the debate could go on practically forever.
If you plan to use the debate system in other games, I feel like you should give each debater a 'health' bar and if one debater wins the round, his opponent loses health but he does not gain health. Thus, the rounds become more limited and we can progress much faster, instead of having to stick with the tediousness of the current system. It's true the player do have some influence over how quickly he wins in the current system, but in the Normal difficulty it got very annoying due to the limited time does not allow you to hone your debating skills too much. This debate system is actually the main factor that made me hesitate to replay the game, so next time if you use something similar, maybe think about 'revolutionizing' it haha :D
Anyhow, that's all I really want to talk about now. I hope I can see more of your games in the future because Reting Rimpoche dating sim is very good ^_^