Natsu ga Owaru made The Animation  

Until The Summer Ends The Animation, 夏が終わるまで The Animation

Yui and Kou have been close friends since childhood and eventually became romantically involved as adults. Their passion for each other was intense, leading them to engage in sexual activity in various locations, including at school. Unfortunately, their actions were discovered by the person responsible for monitoring the school's security cameras, who threatened to release the footage online if they did not comply with his demands. Now, Yui is faced with a difficult decision: either obey her teacher or risk having her intimate moments exposed to the public. Despite the risks, she finds herself becoming increasingly attracted to her teacher.