どんな時でも挨拶は必ずするという白川さん（井桁弘恵）だが、同期の谷口さくら（藤野涼子）に無視をされ続けていた。ある日、白川さんの出した提案書が採用され、メインで働くことに。みんなに応援される白川さんを谷口さんは妬んでいた。
そんな中、取引先から預かっていた重要な資料を紛失してしまう。必死に探す白川さんだったが見つからず、盗まれたのでは？という疑惑も生じ始め…。昔は仲の良かった同期2人の間に、一体何があったのか！？
Mr./Ms. Shirakawa (Hiroe Igiri) always greets people at all times, but she continues to be ignored by her classmate Sakura Taniguchi (Ryoko Fujino). One day, Mr./Ms.'s proposal was adopted and I decided to work as the main worker. Mr./Ms. Taniguchi was jealous of Mr./Ms. Shirakawa, who was supported by everyone. In the meantime, he loses an important document that he had been entrusted with by a business partner. Mr./Ms. Shirakawa desperately searched for it, but he couldn't find it, so it was stolen. Suspicions began to arise ... What happened between the two classmates who used to be good friends?
