game2534> Yep but...just unlocking 2nd affection is useless. 0% 2nd affection girls are like 100% normal affection girls. And you still got Blooming Heart faster than enough gifts. Even with Bond crystals, there is still a limited amount of gifts (and I don't even speak of the D-Medal needing a shit ton of Bond Crystal too). Not enough to max as many girls as Blooming Heart available from LC shop. Or you need to by also gifts from LC shop (at least on DMM) but if you do that, you can't by all the Blooming Heart, all the gifts and all the gold/rainbow skill bloom. and since Nutaku is full of Gold/Rainbow, you need thoses skillbloom harder than everything.
In another words, the actual limitation in the game (not even on Nutaku only) is 2nd affection gifts and not Blooming Heart. Even if Heart seems rarer. Just to compare, on DMM I have 10 Bloomed Affection girls. Only 4 of them are 100%, 2 other are above 60% and the last 4 stay at 0% since months. And there is still 4 Blooming Heart in LC shop. Too hard to get random gifts from gather, too expensive gifts from shop.