The protagonist Nano, a female vampire, got struck a deep wound by the female hero Olivia. She managed to ran away, but she thought she's dead for sure, living 500 years not knowing love.
However, St. Gia appeared before her and gave her her own blood. They spontaneiously fell for each other. They're both females, moreover Nano is a vampire, such a forbidden love must not be allowed to surface. Because of that they continued their strange relationship as friends.
One day, Gia talked to Olivia about Nano. Olivia felt her trust betrayed. She branded Gia as a heretic and had her imprisoned.
Nano found out about it and went to rescue Gia. However Gia was already dirtied by multiple guys. Unable to stand it all, Gia killed herself.
"If I'm reborn again, I want to live happily with you. Forever." -Gia's dying breath
Nano heavily grieved at Gia's death and started to hate the current world where homosexual love is prohibited. She magnificently embraced Gia and wished she had the courage to always stay at her side.
Drowned in sorrow, Nano remembered that an item "Orb of Soulscream" can be used to revive a person. She decided to obtain it at all cost.
However, Olivia forsaw what's Nano planning on doing and snatched and hid Gia's soul.
Furthermore, Olivia is already in possesion of the orb.
To find out where Olivia hid the orb, Nano decided to secretly kidnap and interrogate the royalty of various nations...
