YKK is a manga that revolves around a female robot named Alpha who lives in a far-fetched, but peaceful japan. To start off, YKK was a 90s manga, so a lot of the clothes style and technology are 90s and surprisingly haven't changed much over it's 12 years run. The plot is simple, Alpha a robot who runs cafe and gets occasional customers, and seems to live life in the moment. Some people dropped YKK because they didn't find the story engaging enough or it was too boring. Personally I think that YKK is a soothing, very laid-back and has a nostalgic feel with mysterious undertones. I don't think the manga is necessarily boring but rather slow-paced. Each story, or chapter is very short at about 15 to 20 pages, with little to no dialogue at times, which makes reading very easy. But what really makes YKK special is a the calming art style and the dialogue feel like a mix of a novelistic and poetic words. The art is very detailed from the interior of the cafe to the waves of the sea, plus every volume has a colored chapter to read. The characters are lively and 'slice of life' like, for example, as you read you in the perspective of Alpha, she watches over Takahiro and Makki like a guardian. Through the years that YKK was serialized characters actually age, and because Alpha is a robot she doesn't age, instead she watches as Takahiro and Makki become teenagers, and adults right before her eyes. In YKK there are a lot of questions left when manga ends like why are there so few male robots, what is the purpose of robots, and how the world became peaceful (possibly post-apocalyptic) and such. Overall YKK is one of a kind, a beloved manga by many and is one of my favorites of all time.