Hmm, the card system it is kinda Op :v, when you can get milion berry a day farming for +5 all stats card is easy, it even can stack, if you guy manage to upgrade full ranks for all 3 girls you can have up to 15 card slot and you can put +5 all stats card in all that slot. 5*15=75 all stats, and the game stats limit of each stats is 99 :/ but to do that in no cheat, it will need grinding, lot of grinding