The 5th affection level for Bunny costs nearly 1 million directly and a lot of items, the 5th affection level for Juliette costs nearly 2 million directly and even more items. Due to the changes to pachinko, losses have increased per spin so it's not really a cheap method to get items anymore (especially not on higher levels due to the cost scaling), and the shop prices are high as well. On Juliette alone, I had to spend 4 million total in items and pure currency just to get the last step done, and if you get a girl drop with 30+ girls in your harem it costs even more to reach the third tier of affection than it did to upgrade Juliette to the fifth.