In an Anime Crossover, I Travel Between Worlds with Adult Fairy Tales!

Natsuki transmigrated into a bizarre crossover world.

From the start: an orphan, a snowstorm, and the entrance to an orphanage.

With his knowledge of the crossover world and the wisdom he'd accumulated in his previous life, Natsuki had an IQ of 250 and thrived in Neon City.

After the director passed away, Natsuki inherited his legacy and took care of the adorable little girls.

Yuki Suou is my little sister, and she's also a child at the orphanage. She's strong on the attack but weak on the defense, and even a little intimate contact makes her cry out that she can't take it.

Sora Kasugano is my little sister too. This rebellious little sister is always thinking about how to take her brother down!

The shy Sagiri is also my little sister.

Wait, I seem to have a lot of little sisters. And they all seem like the type to make a move on their big brother!

Then one day, I awakened an ability and unlocked my first dungeon.

"The Forest of Spirits? What kind of dungeon is this?"

"Alice, your skin is so smooth~"

"Alice? Did I turn into a girl?!"

Luckily, it wasn't a gender swap. I simply turned into a pretty girl.

But after I completed the dungeon, the second dungeon was...

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.