I love this so much.
I bet Lapis start to feel jealousy.
I have also the power of foresight, Natori :)
The plot wasn't and never will change in the "game".
it has never been about the brosch. It is about You!
Diana and Lapis will fight for your attention and your heart. The Hero will be getting much much jealous as the time flows and her heart will taint because You fall in love with Lapis, Lapis is love you back.
It is you, who will cause Lapis's death, if you don't sacrifice yourself... like at the training.
You will survive the fatal and final blow by Diana. Lapis and Diana will make up for you, and everybody is happy.