Trinity Translations Team's 12th release is Zettai Zetsumei, by Crimson Comics.
As Yuna and Lulu find themselves captured by monsters, is up to Rikku to rescue them. Unfortunately, things go awry for the girl and soon she finds herself way over her head.
This is Part 3 of a series of FFX doujins by Crimsom Comics. As usual, the work is quite enjoyable.
There's Tentacles and there is Tentacles. Fortunately, this doujin is about the good Tentacles (though that is tremendously relative).