Seinarukana - The Spirit of the Eternity Sword 2

[Nephenthal]

https://www.youtube.com/watch?v=oImbb5itfF4" onclick="window.open(this.href);return false;

24:41 and 54:15 Reime gets free, you hear another mmph from her before she gets free. Unfortunately, no actual image of Reime bound and gagged, but it seems Satsuki got tired of her talking and bound and gagged her. She does some pretty good mmphing in the background which is pretty adorable for the cute girl.