Sister Deng, who always played with Yamato when she was a child, returned to her hometown for a long time. Yamato, who always liked her, invited her to watch the fireworks conference. As a result, on the way, they actually saw a strange man and woman having sex in the forest! In the end, the couple found the two peeking...!? In desperation, Yamato had to pretend that Sister Deng was a lover, and Yamato could not control himself at first...!!!