The first story is pretty decently developed, considering there are just a couple of short chapters of it. However, this works only as far as the plot goes. And maybe Ryo. Keisuke is indeed adorable but there's something to him that gives him that impression of the Prince Charming who turns up in the end to save the day which didn't sit well with me. He had his funny moments, of course, but on the whole there's too little substance to his character, and his motivations are not that clear. He fell in love all too suddenly for a straight guy, and Ryo was not that likeable or cute for me to buy it. I liked the story as a whole, it was entertaining, if devoid of perfect sense, but I guess I was just hoping for something more.
As for the second story, it was, no doubt, the funniest but still too rushed and even more shallow than the first one for me to remember anything at all by tomorrow. It was predictable, I think.
Now, I liked the third story very much. I would have liked it better if the protagonist this time was not the third-wheel from the first story -- which frankly kind of ruined the mood -- but if you look beyond (and you can, since there's no relation whatsoever between the two stories) it's by far the most compelling one. The characters still lack better development and the overall idea, I reckon, is to get it done with, but it was still quite enjoyable. Of course I'm already reviewing this with the sequel to this chapter in mind.
Unlike my experience with Limiter though, in this prequel I found the art style just delightful. I don't know, maybe it grew on me. Ahah. Gotta love the manly man 🙂