Because it's a relationship they both wanted... A school yuri that starts with a secret!

When she learns that Reina, the chairperson of the committee, is interested in yuri, she is shocked to find out that she has to keep her secret and experience yuri sex out of curiosity! Even after that, Reina shows no signs of reluctance, but when she pressures Reina into a relationship and makes love to her, even though it was just for fun, Masakura couldn't forget how good it felt!