Ogi san, I suppose posting anything that isn't a praise would be off-topic.
Anyway, Yumiko is pretty much your run-of-the-mill kuudere with a broken home syndrome. I quite like her despite the stereotypical image, and I'm pretty sure people who have a fetish for that would find her spot-on. Aside from the heroine, her route is my third favorite among the others. It's essentially Makina REVAMP, lavished with lighter tones and a conclusive ending. It gets pretty slow at times, especially in the very beginning and towards the midpoint of the route, but never tedious (e.g. seed of the world tree). The plot was cliche'd at best but it was still nice to see it laid out. It's nothing special but there's nothing overly faulty about it as well.