This game is not F2P.
If you wanna nice pixel game with your favorite anime character than this game offers you that but remember not every hero is god tier.
There is just too many things to pay for.
Heroes, weapons, skins, even items. You can buy them all if you got some cash to burn.
There are whales all over the place and no matter how much you grind you will always be last cause of your heroes level cap for which you need to get luck while summoning or just buy them.
Yeah 1000 summon is a joke you get 3 summons for hitting a level goal and choose 1 of 3 and wait for another 10-15 level up goal which gonna take a long time.
Even FREE VIP is a joke they give you VIP5 for just leveling up and completing some task and boom after that you need to TopUp for more vip points and that matters, cause summoning pitty requires VIP8, skip fight need VIP7 and to buy good and value for money stuff you need VIP6.
So in general this game get the rating of 4/10 for all the false F2P advertising they do.