Grilfriends is the first Yuri Manga I have read and in my opinion, still one of the very best.
It's drawn and written by Milk Morinaga, a Manga Artist whose name you should probably keep in mind if you are a fan of the Genre Yuri.

To put the plot as simply as possible, it's about two girls falling in love with each other and the hardship they have to go trough in order to really make it work out.
There is no thrilling action and no exessive drama, this series is probably one of the most realistic Yuri love storys out there and that's what makes it so enjoyable.

The two main characters Mari and Akko have a great dynamic, while Mari is a very shy and insecure girl, Akko is the complete opposite, loud outgoing and self-confident.
It was fun watching the two girls in their every day life while they slowly but noticably got closer and closer to each other, just in order to have this new found bond being crushed by one careless action. So even though the story of this Manga was never rushed or fast-paced in general, it still sometimes felt like their relationship was one hell of a rollercoaster ride.

In the end, I would recommend this Manga to all the Yuri fans of course, because this is probably the best Yuri title out there right now. Furthermore I also recommend this to everyone that enjoys a cute and heartwarming love story with a lot of great comedy elements and a very nice artwork.

I hope that you can forgive me for my bad grammar since English is not my native language. And of course, I hope you still enjyoed this review and found it helpful.