Looking for Help on LCD Qpet Achievements

[LUC1G07CH1]

Recently, I've purchased a Qpet from AliExpress. It isn't the infamous Tamagotchi + Color clone, but the LCD version. Y'know, the one with a dog, a cat and a bunny.

Of course mine is the dog one, I expected it to be blue but I received it as green instead, but that's not the case now.

I've got 100% closeness and 1000 wisdom today, it showed an end cutscene but I still kept my pet. I've unlocked all achievements EXCEPT one in particular. It looks like a rain.
Do someone know how to get this achievement? Thanks in advance.

 

[LUC1G07CH1]

Discovered it myself, you should actually let your Qpet "die" (it actually runs away). It's impossible to do if you finish the game, because the closeness stat doesn't go down.
Anyways, I've platinumed this Vpet as of today, and I decided to remove the battery and put it back in the box. I don't know when I'll open it again.

 

[Puremoons]

Discovered it myself, you should actually let your Qpet "die" (it actually runs away). It's impossible to do if you finish the game, because the closeness stat doesn't go down.
Anyways, I've platinumed this Vpet as of today, and I decided to remove the battery and put it back in the box. I don't know when I'll open it again.

How do you get your pet to run away?