Great characters and story! I liked Izumi more but it was easier to get on Souma's route :') . Also I'm just gonna talk about spoilers now.
I think the ideal ending would be with Souma since you still get to keep the shop. But who knows, maybe Izumi's grandpa will give back the shop after they've fully made amendments :/
It was such a struggle figuring out how to stop Yuki from stabbing an old man. If there isn't a guide, I wouldn't mind making one, although it'll be like the second guide I've ever made 0-0