The protagonist is a scary youkai?
No, she's a gentle youkai who loves flowers.
Your objective is to create your own fantastic garden, unique to you. Whether you want to make your wide, empty lot into a sprawling field of flowers or a colorful, seasonal orchard, you're given full freedom to make whatever choices you want. You can even build your own house, letting you enjoy a slow lifestyle following your whims with no pressure.
-Become friends with the residents of Gensokyo!
Make friends with those around you to dispel your frightening image! You'll discover places in Gensokyo you're familiar with, packed with their usual residents. From Bhavaagra to the Underground, your list of places to go will expand even further as you make more friends!
-You can grow other things, too!
Besides flowers, you can raise fruits, mushrooms, and even rice grains! Your options will change depending on the season, so when starting out, pick whichever season seems like it'd have something you like!
-Live the slow lifestyle you've always wanted!
There's nothing you HAVE to do, but there are plenty of things you CAN do. Raise your flowers and crops by planting then watering them, then relax until it's time to harvest. Once you've got your own home, you can even try cooking in your kitchen -- find your own special way to have fun! Time will advance in the game, but it'll never hold you back, always letting you take your time and live a relaxing lifestyle.
-Features multiple endings with varying conclusions!
The conclusion that awaits your story will change based on who you've befriended and what you've done. In particular, your fate with a few certain characters...

More details on the official game page of Harvest Yuuka ...