Kaito Fura Gnu Ru No Junkai

[Machine Translation] His late father was a great thief. The eldest son "I" assumed the name of the second phantom thief "Flaneur" for the sake of his injured younger siblings and his beloved nanny. He starts "returning" the treasure to its owner. The next target is an undersea university where genius researchers gather. The veteran detective who was the only one to catch the first phantom thief, Flaneur, and a new generation of great detectives stand in his way, and even an impossible crime occurs! Can the second generation thief, Flaneur, solve the numerous mysteries and complete his mission? A shocking phantom thief mystery is about to begin!

亡き父親の正体は大怪盗だった―!?長男の「ぼく」は、傷ついた弟妹と愛する乳母のため二代目怪盗フラヌールを襲名。持ち主にお宝を戻す“返却活動”を開始する。次なる標的は、天才研究者が集う海底大学。忍びこめたかと思いきや、初代怪盗フラヌールを唯一捕らえたベテラン刑事と、新世代の名探偵が立ちはだかり、不可能犯罪まで発生!二代目怪盗フラヌールは、数多の謎を解き明かし、任務を完遂できるのか!?衝撃の怪盗ミステリー、ここに開幕!