Wow, that's some really amazing luck!
I'm very much interested in this account. As for how long I've been playing, I'd say not very long. I started maybe about three weeks ago, during a time when I was so frustrated with another JP smartphone game (both regarding that game's system and my luck in that said game). And what can I say? I never expected to fall head over heels for SIF and now I think you could say that I'm quite obsessed with this game.
Case in point, I have more or less prioritized SIF over the other games I used to play (and in fact, ran into cases where I reached full AP [the equivalent of LP in those games] in those other smartphone games because I was too absorbed with SIF, and my AP in those games were 100+ points). Other things I have done in the name of SIF include:
(1) Juggling multiple accounts for the sake of improvement. It took me about a few days to be able to play decently at Hard, and I managed to be able to survive Expert songs after one week of playing. (2) Rerolling multiple accounts for a glorious UR. At first, I just joined some giveaways in this sub, but eventually, I decided to do a bunch as a test of my luck and at the same time, a way of giving back to this subreddit that helped me so much when I first started out. I was a heavy lurker too, ahaha.
As for luck, I'd say I'm unconventionally lucky/unlucky. I'm very lucky when it comes to rerolls (like I tend to get a UR every five accounts--and in fact, I have another UR starter giveaway coming up soon), but when it comes to my main account, I'm the type to roll 10+1 and get only one SR. Which is somehow similar to my luck in other JP smartphone games, as I tend to roll those a lot and oftentimes, only get the SR-equivalent of that game. My worst bout of luck would be spending on the equivalent of 500 loveca and only getting those said SR-equivalents (4* characters in those games), which are guaranteed whenever you make a 50 cash currency roll. So yes, I'm quite unlucky in that respect.
As for why I wish to take care of this account: it's rather simple. I want to be able to keep up with people who have started this game a long time ago. My only "mistake", in a manner of speaking, was starting this game really late. Even though I play in accounts with a single UR in them, it's really difficult for me to keep up with people who have started this game a long time ago. Like, that feeling when you're able to FC a Hard song, but end up dead last anyway because your team isn't at max level and/or you lack decent members. That kind of team building takes time, which is time I've already lost due to starting late. So yes, if I won this account, I'll be sure to make it my main, use it to tier high in events, and awe at its beauty. :)
In closing, I'd like to thank you for hosting this giveaway, and hope that you enjoyed. May the luckiest (or unluckiest?) person win!