Woah. they make a gacha worse than Cactace Bride's. Well done Nutaku. Well done.
For the 5*6* gacha, I'm not even sure 6* have not their usual 0.5% chance. It's just a pay 180 €/$/tears of blood for a lot of golds and dupe golds. With maybe some 6*. If the RNG god is with you.