Hellooo!!! I have no idea how to send images but I'll try my best to guide you ;3
You have to do the vanilla route, and it's super important that you grab the book and that you confess to him. The spot isn't super exact but I suggest you go slow while talking to ginger brave, after the conversation the three of them have, a few dialogues happen and before they go to the infirmary you have to touch the roses that are next to the guy who is worshiping the statue. Exactly to the side, on the right.
Idk if it was understood very well but it worked for me touching there, I hope it helps you 😄
sorry if this is not the route that you were searching.And believe me, I also almost broke my head taking out the finals and I still have 3 left.