Hikaru, a younger sister, moved into her older sister's house after her husband's affair caused her to separate from her. She starts job hunting to make a living, but it's not easy for a naive girl who has only ever been a promotional girl to find work... However, when she finally gets an interview and finds out that the company her brother-in-law works for, she begs him, saying, "I'll do anything for you if you get in." Upon hearing this, her brother-in-law makes her wear a swimsuit under the pretense of a mock interview, and plays with her firm, fresh body that his wife doesn't have.