A female body was found in Yamanashi Prefecture.Shishi (Osora Sato), who accidentally saw the news, learned that it might be his missing mother Tachibana Aiko (Machiko Ono), and was greatly shocked, and even developed a high fever.

As a last resort, Kaoru (Yagi Raku Yumi) had no choice but to take him to the pediatric hospital.Facing the registration form, Lu realized once again that he knew nothing about the lion's age and other basic information.He took a leave of absence and clumsily took care of his sick child, and suffered a lot.

That night, Kaoruto and Miruto (Bando Ryuta) accidentally learned that the lion had recently celebrated his birthday.

In order to surprise the lion, the two secretly called Mio (Asuka Saito), Tokichi (Yoshihiro Ogata) and Sadamoto (Sports Okazaki) to plan a birthday party for him.

On the other hand, reporter Kaede (Yuki Sakurai), who has been following the incident in Yamanashi Prefecture, approaches detective Takada (Kakizawa Yuuto) to inquire about the progress of the investigation.During the exchange, a new fact surfaced...