Horikiri Chiyomi's (Iinuma Ai) bag was robbed, and the murderer took the money. The bag and Minami Hiroyuki (Yagi Yusei) contained inside were thrown into a park far away from the crime scene.Nanjun was in pain all over and was at a loss. At this time, he met a woman who was as miniscule as himself-Sanae Tomita (Ryoko Kuninaka)!

Nanjun and Sanae entered “boyfriend”'s pocket together and went to Sanae's home - meeting “people in the same situation for the first time”. Nanjun felt incredible and happily talked to her about the experiences after becoming a 15cm villain.All sorts.

At this time, Chiyomi discovered the robbed bag, but she was heartbroken and horrified to find that Nanjun was not inside.She searched desperately around the bag.Amid the anxiety that she might never see her again, Chiyomi finally reunited with Nanjun in the park!“I will never leave you again”, Chiyomi cried and apologized.Namjoon could feel her heartbeat and tried to comfort her.So the two decided to go to a local summer festival.

For the festival, Kaede (Kimura Yoshino), Yuriko (Kaga Mariko), Shintaro (Takeda Shinji), Takuma (Banke Tensong)... the Horikiri family is bustling.Hisako (Shigeru Muroi) of the handicraft shop also selected kimono fabric for Nanjun“ Doll”, and everyone was very excited.And Shintaro accidentally witnessed the conversation between Chiyomi and the mini version of Nanjun!

Although Shintaro decided not to tell anyone, his covert behavior made other family members suspicious...!