Included in the 5th Generation Inspirit Privileges is a fancafe level up (VIP status), so before making a YES24 account make a DAUM account first. Daum account is what you need to sign-in to Infinite's Official Fancafe.

 #1 Create a DAUM ACCOUNT - Tutorial here ( LINK
#2 Create a YES24 ACCOUNT - Tutorial below
*For creating Yes24 account PLEASE FOLLOW STEP 1 of the tutorial
*For 5th Generation Inspirit Application Go here (LINK) then PLEASE FOLLOW STEP 2 of the tutorial

source: Yes24
posted by: Anjellie_ka of InfiniteUpdates