Kuroki wants badly to rehabilitate Mythos, the young boy caught up in the Logos incident.  When an unmanned bike starts making strange appearances on the roads of Tokyo, he sees his chance to allow Mythos to contribute to society by solving the mystery.  The bike appears and disappears without causing any harm or hurting anyone.  But Mythos thinks that instead of a bored thrill-seeker, the culprit might be a more dangerous foe...
Most likely, there's another aspect.
.هنالك جانب آخر لهذا الأمر على الأرجح
Irgendetwas wird er
damit bezwecken wollen.
Probablemente haya otra cosa.
Probablemente haya otra cosa.
Tout ceci cache 
sûrement autre chose.
È più probabile che ci sia qualcos'altro.
Deve ter outra forma de ver.