Yuri ni Hasamaremashita.

A group of three were drinking at the protagonist's home.
He takes his eyes off the other two for but a moment, and the two lesbian girls start making out!
"You might as well join us. How about it?"
Tempted and teased, the protagonist ends up sandwiched between their supple bodies...
Opening the debaucherous doors to forbidden threesome sex with a yuri lezzy couple!?
In the face of their unlimited lust, the protagonist is wrung dry...