Mirrors:

http://filespace.com/psx834vw8ps7/koyukitakahashiTB4_1_hdmp4.part1.rar.html
http://filespace.com/96l923nfs9ab/koyukitakahashiTB4_1_hdmp4.part2.rar.html
http://filespace.com/f9ls85bu2bpc/koyukitakahashiTB4_1_hdmp4.zip.html