A long-haired woman knight met a blonde tomboy girl warrior.

They become good friends and love to share physical contact, at one point they notice that the warrior can melt themselves with the other and become her armor and weapon; in time they become the perfect couple-knights: one fights and the other is her armor and sword. The sword has a copper handle and a blue blade made of runes that splits like a trident at the handle to make the guard.

After a fight with a giant demon of gluttony, they get separated because the sword wanted to save the people trapped in the building the demon was attacking and the knight needed to escort the fugitives in the underground bunker system.

Years later they meet again.