OBA-261 — My Relative Aunt Mari Secretly Seduces Me Mari Aoi

As a final way to freshen up before his entrance exams, Kyosuke decides to go to Comiket (a comic book sales event) held in a rural area. By coincidence, his mother's older sister Mari's house is nearby, and when she finds out that the event is being held, she asks Mari to let her stay with them for a week while Comiket is being held. On the day of the event, Kyosuke is surprised every time he sees Mari. In fact, she bears a striking resemblance to Lady Romano, Kyosuke's favorite anime character. Since then, Kyosuke has been unable to get Mari out of his head...