Here is the full list of all 57 NejicomiSimulator Vol.2 (Gapping, Amputee sex slave, Petrify, Time Stop) achievements.
Achieve the specified number of logins
Achieve the specified number of unlock setting
Pull the Twin Juicy Peach a lot.
Screwed-in depth achievement
You have penetrated the earth by screwing in.
You have circled the globe by screwing in.
You've exceeded the 1 / 5 speed of light by screwing in.
Achieve the specified number of coming
Pull the Jelly Bean a lot.
Make her drink a lot.