i forgot but 1 one of them turned lita into the queen of leviathan then got killed by bota the worm one tried to kill lita but got killed by lita instead at the final arc 2 of the devil fought eachother one that looks like a blue whale and one that is a giant squid and then theres kraken then theres kentrassi i dont really know who is the 7th one probably got killed in the past by bota's dad or its the giant crab i dont know
I enjoy how you match the lyrics to certain points that work in the webtoons and the parallel between it being about the main girl and than our main guy
If you like this one you might like "how to love my enemy" and another that i recommend you strongly even if it's not the same type of Webtoon is "My deepest secret"