Fantastic Detective 2: Urry Wolf and the Stolen Lunites

Everything we believe in exists. Urry Wolf - a boy inventor - experienced this firsthand.
Completely unexpectedly, Urry notices a spaceship landing outside his window. Or did he imagine it? At the scene, all that remains are a button and suspicious indentations.
However, this incident turns into one of the most exciting stories when an alien creature named Oui appears at Urry's doorstep asking for help to retrieve the missing crystals - lunites. Together with his friend Fabbie, Urry embarks on a complex and detailed investigation. The case takes a sharp turn: familiar faces and classmates come under suspicion. Only insight and resourcefulness help to understand that none of them are involved in the theft.
Will Urry be able to uncover the truth and find out who stole the lunites?