Please don't say it's av

Another excellent work for TMA, the AV company in Japan which is famous for adapting the heating animation into adult video. Imitating the ending song of K-on, TMA makes out its ending theme of K-on AV version. The song is also lowed some steps as not to violate the copyright. Some fan jokes that TMA can consider develop toward music section...All in all, not a bad song and video, right?

Please don't say it's av on youtube: