That was an easy but good mission!! huh?!!

A group of 6 six children containing 3 boys and 3 girls go on an adventure to a place they've never been to, in Japan. Well!! It was a school trip, and who wouldn't want to go on a trip to Japan with all they're friends. While living in such a luxurious hotel, a girl called Ella, discovers something odd perhaps strange as I would describe, and she goes on an adventure to find out the sour truth that's waiting to be discovered, with her 5 friends. Oh! AND comedy is definitely there.
ALSO, this is my first book.