Neko no Meme - LAB2-UndeR GrounD Action Game Ver.1.25 (eng) - Adult Sex Game

A few months have passed since the prequel, "LAB-Still Alive-" incident.
This time another incident is taking place in an underground research facility.
Misa went to investigate but her whereabouts are unknown. Sae heads off to find her.
Just what is happening in the underground facility...
Where has Misa head off too... and what fate awaits Sae...?