I Am the New Book of Variety Monster

I Recently Want to Watch Magic Truck God or Alliance Truck God

Requesting to travel through time to become the protagonist's sister or brother, who traveled to a different world with his father and was blackmailed by the villain.

I'm Begging for a Book About Little Column Under the Sea. the Best CP Is from Captain Buck and Dr. Pi.

Please Travel to the Earth-Bound Boy Hanako-Kun

Isn't there a book about "Little Column under the Sea"?