I don't know if it's really a bug, bcuz I'm not aware of the costs of affection upgrades.
I Just took as a base the table found in harem heroes wiki
http://prntscr.com/j35ffa
http://prntscr.com/j35fm9
*prints contents table
Anyway. This week I upgrade Levitya to 4 grade's affection and it's cost 2.7m.
Before her I just upgraded other 4 girls at that grade or more and according to the table above, this should cost me 675k.
Even though I've increase other girls to grade 3 before her, they don't have the 4 and 5 grades released.
So, this table content's right?
If not, does anyone have a correct table?
If content's is right, it's a bug counting maximum 3 stars girls to be upgraded?
Thanks in advance