Hot Gimmick, Volume 1 Book

When she learns that her sister Akane is late with her period, Hatsumi dresses up in disguise and goes to the drug store to get a pregnancy test. A guy tries to help her, but she is too afraid of being recognized and runs away. However, she does manage to get the test and is in the midst of happily returning home when she crashes into the last person she wants to see: Ryouki. To make things worse, she drops the test and he finds it. When Ryouki tells her he knows it's for her sister, she begs him not to tell his mother, Mrs. Tachibana. Ryouki agrees on one condition: that Hatsumi becomes his slave. In that moment, the guy from the drug store reappears, stopping Ryouki, and Hatsumi realizes it's Azusa, her childhood protector. He is back.