October 27 released compilation album Houkago Tea Time II has sold over 55,000 copies on its first day. Even the best selling K-ON singles so far have never reached over 30,000 copies on the first day. The album consists of 2 discs (Studio Mix, Cassette Mix) and includes 10 new songs. The limited edition, in addition, comes with a replica of the cassette that the K-ONbu members have recorded in episode 23, whose contents are the same as of the Cassette Mix CD.
Interested souls can still get at least the regular edition over on CDJapan. The limited edition has been long sold out, or rather pre-ordered out ^^’