The icon is really obvious when you get it. I would like to note that it is possible to get a true end on your very first run using only Miku/Ai/Eri/Ryo as your only paid DLC. I should record that sort of run one day.
Is that before or AFTER you abuse a loophole in how 'new games' are calculated?
For those who don't know, it's possible to unlock 98% of the first store, (the other 2% requires you to finish the game once first, which is of course the 765 headset) with a single run. You don't go into New Game+ mode until BK is available (Because until then, none of the 'Items on sale which require a loop' will be available to you), something which I found out the hard way )
Why is that note relevant?
In theory, if you have enough time on your hands, a game doesn't count as completed as a new game until you well, actually complete week 55 and force BK to unlock. The game WILL not recognise you've even finished it the FIRST time until both conditions happen.
In turn, this means if you deliberately stall BK's unlock, and NEVER post a producer score (namely, complete the game at week 55, just run to week 54, then start over as many times as it takes), you can buy out one entire store, and have everything accessible to you (charms included) for a single shot (Hyper if you so wish) True end S rank right off the bat, and the game will note it as your first run.
You don't even need any DLC for this to happen.