The Promise Kept Tae Young x Fem!Reader Demon Slayer x Turning Red

Tomioka Y/n and her brother, Tomioka Giyuu have been assigned to protect a group containing 5 boys that all have Marechi Blood from demons who frequently have dreamed of eating their corpses and drinking their blood to get stronger.

Mostly the Demon King, Kibutsuji Muzan.

The brother and sister duo did as they were asked and watched them from their windowsills every night to following them to their whereabouts in daylight no matter how hard it may be.

After watching the world known group now called '4*Town' as to what they heard, Giyuu noticed that his sister, during their nighttime meet ups at the roof keeps on rambling about a specific member from the group.

Giyuu may think that his sister may have caucaughtght feelings for someone who may think of her as a stranger. He knew it will be tough on his sister if they both reveal themselves to the group soon yet he still supported her.

During a Lunar Eclipse, a mysterious huge red panda had wrecked the guysstadium where the boys' concert was taking place. While wreaking havoc, the Demon Lord has taken this chance to approach the boys tied up on the stage and devour them.

However, his plan will become a complete mess once Y/n and Giyuu call for some back up back at the headquarters.

After this whole battle, would Tae Young and Tomioka Y/n develop a slow pace but adorable relationship?

Find out on your own!