先生モードの弱音ハクによる ♪ Swalla ♪ です。
また、ローアングル版も全般にて公開しています。

The following is English explanation.
Title : [MMD R18] It is a ♪ Swalla ♪ undressing version in a Haku teacher.
It is ♪ Swalla ♪ by HakuYowane of a teacher mode.
Also, it is making public a low angle version, too, in general.

Still more, this English is a decodement by the translation software, we think that there is the part which the interpretation is difficult by probably but please pardon.