This is probably one, if not the best, fanarts of K-On! that I have seen on dA. This is indeed an excellent rendition of the characters wearing their signature ED outfits in your style, especially in a traditional medium, which you already seem to have mastered long ago.

I do like the horizontal composition in this, but it looks a bit unbalanced. I think this will look better if the right side of the picture is expanded more to better balance the composition more.

I can't really make sense of the transparent plastic looking sheets that are on the ground other than the fact that it gives the characters something to sit on and making the ground plane of grass look less monotonous. They look very nice, but it just does not work out for me.

It's interesting how you used a Miku Hatsune song instead of a song from the series for the sheet musics. I guess its alright if you are really making a very nice tribute for it.

The poses and facial expressions seem fitting for the characters and their personalities. They all seem to make the characters look pretty relaxed (while listening to music), which is good.

The sky looks pretty good. The cloud formations are evidences for the goodness. I can't say much because they look good already. I don't believe adding shadows under the clouds to create a better sense of volume is not going to contribute much to this picture's improvement.

The blue roses in the cracked glass container is a nice touch. However, the roses are probably making the glass look a bit too transparent.

Overall, it is an excellent piece that has already done its job in capturing and impressing the audience with its terrific execution of subject matter. At the same time, this picture still has a little more room for improvement.

Two things drew me to this picture. One, I am a fan of the series K-ON. Two, the little details caught my eye.

The characters are immediately recognizable as being from the series, which is always good. The colors of the characters are also spot on. I can also see why you chose to go with Mugi in long hair as the bun she has in the closing credits would have ended up blocking some of Ritsu's head.

The overall blue tone does give a sence of both lightness and calm, but I'll agree with a previous critic and say that using the same tone for the glass beneath them washes Mio's legs out. I'm certainly no expert with Copic markers so I'll say that for a first attempt at "glass" it's not entirely too bad. It seems you have the reflective technique down, but shade it too much to really give it that glassy feel. It seems it's more like granite then it is glass.

Where it isn't shaded enough, actually, is the broken glass dome with the blue rose. Around the rose itself it looks like there is glass, but there isn't enough color muting on the rose colors to make it look like it's behind glass. Probably should have gone with a red rose so that it could be shaded a little bit towards a blue tone (not to mention be a little part of the ending credits). I understand why you went with it as it's where the blue butterflys are coming from, but maybe a color shift could add some dynamics to the overall look.

I really enjoy the look of the clouds. It's very subtle and at first you don't notice the shift of the clouds into the form of butterflies. It gave me a nice "oh!" moment when I gave it all a closer look.

The work is very enjoyable to look at and I will be adding it to my favorites.