Uchi No Shitsuji Ni Negattanaraba 7 (Kadokawa Bunko)

[Machine Translation] During Ayase's hospitalization, a series of graffiti incidents occur at her high school. When Ayase is asked for help by a classmate who is suspected of being the culprit, she asks for advice from Hua Ying and Seok Sose. The two begin to investigate for Ayase, but Hua Ying is asked by an art teacher named Fukuiri if she has any relatives named Shichisoku Rin. It was the name of Hua Ying's mother, who is now deceased. Meanwhile, Koromizuki, during his investigation of the painting substitution scandal, comes across the name "Shichisoku Rin"...? This is the 7th installment of the popular upper class mystery!

綾瀬の入院中に彼女の高校で起きた連続落書き事件。犯人だと疑われているクラスメイトから助けを求められた綾瀬は、花穎と石漱にアドバイスを求める。綾瀬のために調査に乗り出す2人だが、花穎は福入という美術教師から、「七束琳という親戚はいないか」と尋ねられる。それは今は亡き花穎の母の名前だった。一方衣更月は、絵画のすりかえ騒動の調査中に「七束琳」という名を目にし...!?大人気上流階級ミステリ第7弾!