Tokutou Tenjouin α no Nanjiken
特等添乗員αの難事件
Source
Case File of All-Round Appraiser Q
Bannou Kanteishi Q no Jikenbo· 万能鑑定士Qの事件簿
manga
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68
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The main character is the 23 years old Riko Rinda aka "Q", an all purpose appraiser, which with her wide range of knowledge, her great memory and her reasoning, she can detect the true value of everything.