Pretty sure that I found this on /a/ years ago but it's only now that I found it on my HDD and played it. Time for another thread desu. The VN is quite nice, the plot is nothing special and the setting is a bit wacky but it's fine, it does its job fine in serving as a means for interpersonal relations between the characters, and the heroine is cute and the H-scenes are really comfy, so that's all you need to bake a cake. It has a gameplay element of the Cannonball races which you have to learn how to do (or you could just look at a gameplay guide, but that's basically cheating and you lose half the fun of learning how to play the game), and depending on your results, you can unlock extra H-scenes and goodies.
As a word of warning, you have to complete both routes to get the full ending, but getting both routes is pretty unintuitive along with some other things, so if you need to look at the walkthrough.