[JP] Nazo no Kanojo X

[WTK]

Amazon Japan listings: Vol.1, Vol.2, Vol.3, Vol.4, Vol.5, Vol.6

Vol.1 - 6825yen, 6/27 | 6 volumes total (@ 6825yen each)

via CD Japan
Vol.1 - 6/27

Includes episodes 1 and 2, special CD (opening theme "Koi no Orchestra"), booklet (8 pages), picture label in digipak and outer case.
Special Features: textless intro & outro (subject to change)

Vol.2 - 7/25

Includes episodes 3 and 4, special CD, booklet (8 pages), picture label in digipak and outer case.

(source)