Takamaru Seko

Following a lead from Fujiko, Lupin and Jigen excavate the sea floor in Kiritappu to search for a lost underwater treasure that supposedly holds the secrets of time travel. After the Lupin gang escapes a run-in with the law, a strange man calling himself Kyousuke Mamoh strands the Lupin gang hundreds of years in the past.

Shouichi encounters his old friend and caretaker Dr. Higashi Kunieda. Dr. Kunieda, a friend of Yoshihiko Misugi, took care of him while he was hospitalized with amnesia. After catching up on a year of separation Shouichi abruptly leaves to house to fight an Unknown as Agito Burning Form. Unfortunately, after the Unknown flees Shouichi loses control of himself and attacks Dr. Kunieda, who followed Shoucihi and watched him transform. Dr. Kunieda managed to calm him down but Shouichi becomes to afraid of himself and runs away.