Help – Kokumin Nenkin

So Im an international student in japan, ive already paid for NHI and now ive got the payments for kokumin nenkin.

This plan was suggested to me:
1. Fill out the student deferral form and defer until march (bc thats when the payments are up until) and submit it at city hall
2. Withdraw from kokumin nenkin in feb (bc thats when I go back to my country), which means I end up paying nothing

Is that a valid thing to do? Has anyone else ever done this? It sounds too good to be true, and im terrified ans i rly dont wanna get in trouble w the law or sum (please help)

by No_Technology5905